211212112120 has 32 divisors (see below), whose sum is σ = 491614401600. Its totient is φ = 81571573888.

The previous prime is 211212112103. The next prime is 211212112141. The reversal of 211212112120 is 21211212112.

It is a super-2 number, since 2×211212112120² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211212112094 and 211212112103.

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 7 ways as a sum of consecutive naturals, for example, 91038544 + ... + 91040863.

It is an arithmetic number, because the mean of its divisors is an integer number (15362950050).

Almost surely, 2^211212112120 is an apocalyptic number.

211212112120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211212112120 is an abundant number, since it is smaller than the sum of its proper divisors (280402289480).

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

211212112120 is a wasteful number, since it uses less digits than its factorization.

211212112120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182079447 (or 182079443 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211212112120 its reverse (21211212112), we get a palindrome (232423324232).

The spelling of 211212112120 in words is "two hundred eleven billion, two hundred twelve million, one hundred twelve thousand, one hundred twenty".