102000010021 has 8 divisors (see below), whose sum is σ = 125538473984. Its totient is φ = 80703304560.

The previous prime is 102000009953. The next prime is 102000010031. The reversal of 102000010021 is 120010000201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102000010021 - 2¹⁷ = 101999878949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a junction number, because it is equal to n+sod(n) for n = 102000009986 and 102000010013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102000010031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560439525 + ... + 560439706.

It is an arithmetic number, because the mean of its divisors is an integer number (15692309248).

Almost surely, 2^102000010021 is an apocalyptic number.

It is an amenable number.

102000010021 is a deficient number, since it is larger than the sum of its proper divisors (23538463963).

102000010021 is a wasteful number, since it uses less digits than its factorization.

102000010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120879251.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 102000010021 its reverse (120010000201), we get a palindrome (222010010222).

The spelling of 102000010021 in words is "one hundred two billion, ten thousand, twenty-one".