10100021010021 has 64 divisors (see below), whose sum is σ = 16087327641600. Its totient is φ = 6242582131200.

The previous prime is 10100021010019. The next prime is 10100021010029. The reversal of 10100021010021 is 12001012000101.

It is a happy number.

It is not a de Polignac number, because 10100021010021 - 2¹ = 10100021010019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10100021009985 and 10100021010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10100021010029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 335634186 + ... + 335664276.

It is an arithmetic number, because the mean of its divisors is an integer number (251364494400).

Almost surely, 2^{10100021010021} is an apocalyptic number.

It is an amenable number.

10100021010021 is a deficient number, since it is larger than the sum of its proper divisors (5987306631579).

10100021010021 is a wasteful number, since it uses less digits than its factorization.

10100021010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44087 (or 44081 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10100021010021 its reverse (12001012000101), we get a palindrome (22101033010122).

The spelling of 10100021010021 in words is "ten trillion, one hundred billion, twenty-one million, ten thousand, twenty-one".