1010021000021 has 16 divisors (see below), whose sum is σ = 1115957608128. Its totient is φ = 906489552000.

The previous prime is 1010021000003. The next prime is 1010021000047. The reversal of 1010021000021 is 1200001200101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1010021000021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1010020999972 and 1010021000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010021006021) 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, 924440 + ... + 1695473.

It is an arithmetic number, because the mean of its divisors is an integer number (69747350508).

Almost surely, 2^{1010021000021} is an apocalyptic number.

1010021000021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1010021000021 is a deficient number, since it is larger than the sum of its proper divisors (105936608107).

1010021000021 is a wasteful number, since it uses less digits than its factorization.

1010021000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620372.

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

Adding to 1010021000021 its reverse (1200001200101), we get a palindrome (2210022200122).

The spelling of 1010021000021 in words is "one trillion, ten billion, twenty-one million, twenty-one", and thus it is an aban number and an uban number.