111122011021212 has 18 divisors (see below), whose sum is σ = 280891750081488. Its totient is φ = 37040670340392.

The previous prime is 111122011021171. The next prime is 111122011021261. The reversal of 111122011021212 is 212120110221111.

It is a happy number.

111122011021212 is a `hidden beast` number, since 1 + 111 + 220 + 110 + 212 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×111122011021212² (a number of 29 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1543361264148 + ... + 1543361264219.

Almost surely, 2^{111122011021212} is an apocalyptic number.

111122011021212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111122011021212 is an abundant number, since it is smaller than the sum of its proper divisors (169769739060276).

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

111122011021212 is a wasteful number, since it uses less digits than its factorization.

111122011021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086722528377 (or 3086722528372 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111122011021212 its reverse (212120110221111), we get a palindrome (323242121242323).

The spelling of 111122011021212 in words is "one hundred eleven trillion, one hundred twenty-two billion, eleven million, twenty-one thousand, two hundred twelve".