10102001021 has 16 divisors (see below), whose sum is σ = 11632769280. Its totient is φ = 8593361280.

The previous prime is 10102001017. The next prime is 10102001047. The reversal of 10102001021 is 12010020101.

It is not a de Polignac number, because 10102001021 - 2² = 10102001017 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 (10102001821) 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, 555056 + ... + 572966.

It is an arithmetic number, because the mean of its divisors is an integer number (727048080).

Almost surely, 2^10102001021 is an apocalyptic number.

It is an amenable number.

10102001021 is a deficient number, since it is larger than the sum of its proper divisors (1530768259).

10102001021 is a wasteful number, since it uses less digits than its factorization.

10102001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18524.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 10102001021 its reverse (12010020101), we get a palindrome (22112021122).

The spelling of 10102001021 in words is "ten billion, one hundred two million, one thousand, twenty-one".