212111122120 has 32 divisors (see below), whose sum is σ = 481975281720. Its totient is φ = 84004403200.

The previous prime is 212111122109. The next prime is 212111122163. The reversal of 212111122120 is 21221111212.

It can be written as a sum of positive squares in 4 ways, for example, as 184180022244 + 27931099876 = 429162^2 + 167126^2 .

It is a super-2 number, since 2×212111122120² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212111122094 and 212111122103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26247337 + ... + 26255416.

Almost surely, 2^212111122120 is an apocalyptic number.

212111122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212111122120 is an abundant number, since it is smaller than the sum of its proper divisors (269864159600).

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

212111122120 is a wasteful number, since it uses less digits than its factorization.

212111122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52502865 (or 52502861 counting only the distinct ones).

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

Adding to 212111122120 its reverse (21221111212), we get a palindrome (233332233332).

The spelling of 212111122120 in words is "two hundred twelve billion, one hundred eleven million, one hundred twenty-two thousand, one hundred twenty".