111221122111212 has 24 divisors (see below), whose sum is σ = 266529896231536. Its totient is φ = 36071715279168.

The previous prime is 111221122111201. The next prime is 111221122111213. The reversal of 111221122111212 is 212111221122111.

It is a super-2 number, since 2×111221122111212² (a number of 29 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (111221122111213) 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, 125249010943 + ... + 125249011830.

Almost surely, 2^{111221122111212} is an apocalyptic number.

111221122111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111221122111212 is an abundant number, since it is smaller than the sum of its proper divisors (155308774120324).

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

111221122111212 is a wasteful number, since it uses less digits than its factorization.

111221122111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250498022817 (or 250498022815 counting only the distinct ones).

The product of its digits is 64, while the sum is 21.

Adding to 111221122111212 its reverse (212111221122111), we get a palindrome (323332343233323).

It can be divided in two parts, 111221122111 and 212, that multiplied together give a palindrome (23578877887532).

The spelling of 111221122111212 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twelve".