21010102101010 has 32 divisors (see below), whose sum is σ = 41256442234944. Its totient is φ = 7639992360000.

The previous prime is 21010102101007. The next prime is 21010102101059. The reversal of 21010102101010 is 1010120101012.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 22656565 + ... + 23565655.

It is an arithmetic number, because the mean of its divisors is an integer number (1289263819842).

Almost surely, 2^{21010102101010} is an apocalyptic number.

21010102101010 is a deficient number, since it is larger than the sum of its proper divisors (20246340133934).

21010102101010 is a wasteful number, since it uses less digits than its factorization.

21010102101010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119210.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21010102101010 its reverse (1010120101012), we get a palindrome (22020222202022).

It can be divided in two parts, 21010102 and 101010, that added together give a palindrome (21111112).

The spelling of 21010102101010 in words is "twenty-one trillion, ten billion, one hundred two million, one hundred one thousand, ten".