213113211220 has 48 divisors (see below), whose sum is σ = 550815689088. Its totient is φ = 67446817920.

The previous prime is 213113211211. The next prime is 213113211251. The reversal of 213113211220 is 22112311312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58545766 + ... + 58549405.

It is an arithmetic number, because the mean of its divisors is an integer number (11475326856).

Almost surely, 2^213113211220 is an apocalyptic number.

213113211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213113211220 is an abundant number, since it is smaller than the sum of its proper divisors (337702477868).

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

213113211220 is a wasteful number, since it uses less digits than its factorization.

213113211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117095200 (or 117095198 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 213113211220 its reverse (22112311312), we get a palindrome (235225522532).

The spelling of 213113211220 in words is "two hundred thirteen billion, one hundred thirteen million, two hundred eleven thousand, two hundred twenty".