111121020221212 has 12 divisors (see below), whose sum is σ = 194462091161856. Its totient is φ = 55560422746400.

The previous prime is 111121020221209. The next prime is 111121020221243. The reversal of 111121020221212 is 212122020121111.

It is a happy number.

It is a super-2 number, since 2×111121020221212² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111121020221212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18936289 + ... + 24100312.

It is an arithmetic number, because the mean of its divisors is an integer number (16205174263488).

Almost surely, 2^{111121020221212} is an apocalyptic number.

It is an amenable number.

111121020221212 is a deficient number, since it is larger than the sum of its proper divisors (83341070940644).

111121020221212 is a wasteful number, since it uses less digits than its factorization.

111121020221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43682108 (or 43682106 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111121020221212 its reverse (212122020121111), we get a palindrome (323243040342323).

The spelling of 111121020221212 in words is "one hundred eleven trillion, one hundred twenty-one billion, twenty million, two hundred twenty-one thousand, two hundred twelve".