21001021000010 has 32 divisors (see below), whose sum is σ = 38299669369920. Its totient is φ = 8290140110208.

The previous prime is 21001020999971. The next prime is 21001021000093. The reversal of 21001021000010 is 1000012010012.

It is a super-2 number, since 2×21001021000010² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22093472 + ... + 23024411.

It is an arithmetic number, because the mean of its divisors is an integer number (1196864667810).

Almost surely, 2^{21001021000010} is an apocalyptic number.

21001021000010 is a deficient number, since it is larger than the sum of its proper divisors (17298648369910).

21001021000010 is a wasteful number, since it uses less digits than its factorization.

21001021000010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45118502.

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

Adding to 21001021000010 its reverse (1000012010012), we get a palindrome (22001033010022).

The spelling of 21001021000010 in words is "twenty-one trillion, one billion, twenty-one million, ten", and thus it is an aban number and an uban number.