212113320 has 32 divisors (see below), whose sum is σ = 636340320. Its totient is φ = 56563520.

The previous prime is 212113313. The next prime is 212113327. The reversal of 212113320 is 23311212.

212113320 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212113313) and next prime (212113327).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212113320.

It is not an unprimeable number, because it can be changed into a prime (212113327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883686 + ... + 883925.

It is an arithmetic number, because the mean of its divisors is an integer number (19885635).

Almost surely, 2^212113320 is an apocalyptic number.

212113320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212113320 is an abundant number, since it is smaller than the sum of its proper divisors (424227000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212113320 is a wasteful number, since it uses less digits than its factorization.

212113320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767625 (or 1767621 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 212113320 is about 14564.1106834575. The cubic root of 212113320 is about 596.3794184832.

Adding to 212113320 its reverse (23311212), we get a palindrome (235424532).

It can be divided in two parts, 21211 and 3320, that added together give a triangular number (24531 = T₂₂₁).

The spelling of 212113320 in words is "two hundred twelve million, one hundred thirteen thousand, three hundred twenty".