21010102101008 has 10 divisors (see below), whose sum is σ = 40707072820734. Its totient is φ = 10505051050496.

The previous prime is 21010102101007. The next prime is 21010102101059. The reversal of 21010102101008 is 80010120101012.

It can be written as a sum of positive squares in only one way, i.e., 14623220737024 + 6386881363984 = 3824032^2 + 2527228^2 .

It is not an unprimeable number, because it can be changed into a prime (21010102101007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656565690641 + ... + 656565690672.

Almost surely, 2^{21010102101008} is an apocalyptic number.

It is an amenable number.

21010102101008 is a deficient number, since it is larger than the sum of its proper divisors (19696970719726).

21010102101008 is a wasteful number, since it uses less digits than its factorization.

21010102101008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313131381321 (or 1313131381315 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

The spelling of 21010102101008 in words is "twenty-one trillion, ten billion, one hundred two million, one hundred one thousand, eight".