2010021000021 has 32 divisors (see below), whose sum is σ = 3153094992000. Its totient is φ = 1261141297920.

The previous prime is 2010020999989. The next prime is 2010021000023. The reversal of 2010021000021 is 1200001200102.

It is not a de Polignac number, because 2010021000021 - 2⁵ = 2010020999989 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 = 2010020999967 and 2010021000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2010021000023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14757451 + ... + 14893031.

It is an arithmetic number, because the mean of its divisors is an integer number (98534218500).

Almost surely, 2^{2010021000021} is an apocalyptic number.

It is an amenable number.

2010021000021 is a deficient number, since it is larger than the sum of its proper divisors (1143073991979).

2010021000021 is a wasteful number, since it uses less digits than its factorization.

2010021000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167906 (or 167900 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 2010021000021 its reverse (1200001200102), we get a palindrome (3210022200123).

The spelling of 2010021000021 in words is "two trillion, ten billion, twenty-one million, twenty-one", and thus it is an aban number and an uban number.