10202100020021 has 16 divisors (see below), whose sum is σ = 12557647363968. Its totient is φ = 8071209144000.

The previous prime is 10202100020003. The next prime is 10202100020023. The reversal of 10202100020021 is 12002000120201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10202100020021 - 2¹⁸ = 10202099757877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10202100019984 and 10202100020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202100020023) 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, 4485830 + ... + 6366071.

It is an arithmetic number, because the mean of its divisors is an integer number (784852960248).

Almost surely, 2^{10202100020021} is an apocalyptic number.

It is an amenable number.

10202100020021 is a deficient number, since it is larger than the sum of its proper divisors (2355547343947).

10202100020021 is a wasteful number, since it uses less digits than its factorization.

10202100020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10862252.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 10202100020021 its reverse (12002000120201), we get a palindrome (22204100140222).

The spelling of 10202100020021 in words is "ten trillion, two hundred two billion, one hundred million, twenty thousand, twenty-one".