111210222012021 has 108 divisors (see below), whose sum is σ = 187587162411012. Its totient is φ = 63428006400000.

The previous prime is 111210222012017. The next prime is 111210222012053. The reversal of 111210222012021 is 120210222012111.

111210222012021 is a `hidden beast` number, since 111 + 210 + 2 + 220 + 120 + 2 + 1 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 33864089549796 + 77346132462225 = 5819286^2 + 8794665^2 .

It is not a de Polignac number, because 111210222012021 - 2² = 111210222012017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111210222011985 and 111210222012003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111210222012121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 3808424221 + ... + 3808453421.

Almost surely, 2^{111210222012021} is an apocalyptic number.

111210222012021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111210222012021 is a deficient number, since it is larger than the sum of its proper divisors (76376940398991).

111210222012021 is a wasteful number, since it uses less digits than its factorization.

111210222012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41364 (or 41333 counting only the distinct ones).

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

Adding to 111210222012021 its reverse (120210222012111), we get a palindrome (231420444024132).

The spelling of 111210222012021 in words is "one hundred eleven trillion, two hundred ten billion, two hundred twenty-two million, twelve thousand, twenty-one".