212111102120 has 32 divisors (see below), whose sum is σ = 480107779200. Its totient is φ = 84336387648.

The previous prime is 212111102117. The next prime is 212111102129. The reversal of 212111102120 is 21201111212.

It is a super-2 number, since 2×212111102120² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212111102095 and 212111102104.

It is not an unprimeable number, because it can be changed into a prime (212111102129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15869900 + ... + 15883259.

It is an arithmetic number, because the mean of its divisors is an integer number (15003368100).

Almost surely, 2^212111102120 is an apocalyptic number.

212111102120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212111102120 is an abundant number, since it is smaller than the sum of its proper divisors (267996677080).

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

212111102120 is a wasteful number, since it uses less digits than its factorization.

212111102120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31753337 (or 31753333 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212111102120 its reverse (21201111212), we get a palindrome (233312213332).

The spelling of 212111102120 in words is "two hundred twelve billion, one hundred eleven million, one hundred two thousand, one hundred twenty".