102021010021 has 32 divisors (see below), whose sum is σ = 120810272000. Its totient is φ = 86107613760.

The previous prime is 102021009991. The next prime is 102021010051. The reversal of 102021010021 is 120010120201.

It is an interprime number because it is at equal distance from previous prime (102021009991) and next prime (102021010051).

It is not a de Polignac number, because 102021010021 - 2³¹ = 99873526373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021010051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6085711 + ... + 6102451.

It is an arithmetic number, because the mean of its divisors is an integer number (3775321000).

Almost surely, 2^102021010021 is an apocalyptic number.

It is an amenable number.

102021010021 is a deficient number, since it is larger than the sum of its proper divisors (18789261979).

102021010021 is a wasteful number, since it uses less digits than its factorization.

102021010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17034 (or 17020 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 102021010021 its reverse (120010120201), we get a palindrome (222031130222).

The spelling of 102021010021 in words is "one hundred two billion, twenty-one million, ten thousand, twenty-one".