111210021220212 has 72 divisors (see below), whose sum is σ = 283986806841192. Its totient is φ = 36691435296000.

The previous prime is 111210021220211. The next prime is 111210021220219. The reversal of 111210021220212 is 212022120012111.

111210021220212 is a `hidden beast` number, since 1 + 1 + 1 + 210 + 0 + 21 + 220 + 212 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 33005783344356 + 78204237875856 = 5745066^2 + 8843316^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111210021220211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6758538 + ... + 16373694.

Almost surely, 2^{111210021220212} is an apocalyptic number.

111210021220212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111210021220212 is an abundant number, since it is smaller than the sum of its proper divisors (172776785620980).

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

111210021220212 is a wasteful number, since it uses less digits than its factorization.

111210021220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9618449 (or 9618444 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111210021220212 its reverse (212022120012111), we get a palindrome (323232141232323).

The spelling of 111210021220212 in words is "one hundred eleven trillion, two hundred ten billion, twenty-one million, two hundred twenty thousand, two hundred twelve".