102020111010021 has 16 divisors (see below), whose sum is σ = 136450343487744. Its totient is φ = 67801701778944.

The previous prime is 102020111009951. The next prime is 102020111010023. The reversal of 102020111010021 is 120010111020201.

It is not a de Polignac number, because 102020111010021 - 2⁷ = 102020111009893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102020111009979 and 102020111010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020111010023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413256 + ... + 14290241.

It is an arithmetic number, because the mean of its divisors is an integer number (8528146467984).

Almost surely, 2^{102020111010021} is an apocalyptic number.

It is an amenable number.

102020111010021 is a deficient number, since it is larger than the sum of its proper divisors (34430232477723).

102020111010021 is a wasteful number, since it uses less digits than its factorization.

102020111010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14710700.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 102020111010021 its reverse (120010111020201), we get a palindrome (222030222030222).

The spelling of 102020111010021 in words is "one hundred two trillion, twenty billion, one hundred eleven million, ten thousand, twenty-one".