111202101010021 has 16 divisors (see below), whose sum is σ = 134590392274176. Its totient is φ = 89691587732736.

The previous prime is 111202101009959. The next prime is 111202101010073. The reversal of 111202101010021 is 120010101202111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111202101010021 - 2¹¹ = 111202101007973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111202101009983 and 111202101010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111202101013021) 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 15 ways as a sum of consecutive naturals, for example, 91425721 + ... + 92634046.

It is an arithmetic number, because the mean of its divisors is an integer number (8411899517136).

Almost surely, 2^{111202101010021} is an apocalyptic number.

It is an amenable number.

111202101010021 is a deficient number, since it is larger than the sum of its proper divisors (23388291264155).

111202101010021 is a wasteful number, since it uses less digits than its factorization.

111202101010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184064868.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111202101010021 its reverse (120010101202111), we get a palindrome (231212202212132).

The spelling of 111202101010021 in words is "one hundred eleven trillion, two hundred two billion, one hundred one million, ten thousand, twenty-one".