111122012121020 has 24 divisors (see below), whose sum is σ = 233431043227200. Its totient is φ = 44434553844032.

The previous prime is 111122012120971. The next prime is 111122012121037. The reversal of 111122012121020 is 20121210221111.

It is a self number, because there is not a number n which added to its sum of digits gives 111122012121020.

It is a congruent number.

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, 890623835 + ... + 890748594.

It is an arithmetic number, because the mean of its divisors is an integer number (9726293467800).

Almost surely, 2^{111122012121020} is an apocalyptic number.

111122012121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111122012121020 is an abundant number, since it is smaller than the sum of its proper divisors (122309031106180).

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

111122012121020 is a wasteful number, since it uses less digits than its factorization.

111122012121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781375557 (or 1781375555 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111122012121020 its reverse (20121210221111), we get a palindrome (131243222342131).

The spelling of 111122012121020 in words is "one hundred eleven trillion, one hundred twenty-two billion, twelve million, one hundred twenty-one thousand, twenty".