102010210021 has 16 divisors (see below), whose sum is σ = 106106932800. Its totient is φ = 97952803200.

The previous prime is 102010209947. The next prime is 102010210039. The reversal of 102010210021 is 120012010201.

It is a cyclic number.

It is not a de Polignac number, because 102010210021 - 2⁷ = 102010209893 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 (102010210091) 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, 9362745 + ... + 9373633.

It is an arithmetic number, because the mean of its divisors is an integer number (6631683300).

Almost surely, 2^102010210021 is an apocalyptic number.

It is an amenable number.

102010210021 is a deficient number, since it is larger than the sum of its proper divisors (4096722779).

102010210021 is a wasteful number, since it uses less digits than its factorization.

102010210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12660.

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

Adding to 102010210021 its reverse (120012010201), we get a palindrome (222022220222).

The spelling of 102010210021 in words is "one hundred two billion, ten million, two hundred ten thousand, twenty-one".