21010010010102 has 24 divisors (see below), whose sum is σ = 46293242397480. Its totient is φ = 6884636048160.

The previous prime is 21010010010071. The next prime is 21010010010163. The reversal of 21010010010102 is 20101001001012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9891717399 + ... + 9891719522.

It is an arithmetic number, because the mean of its divisors is an integer number (1928885099895).

Almost surely, 2^{21010010010102} is an apocalyptic number.

21010010010102 is an abundant number, since it is smaller than the sum of its proper divisors (25283232387378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21010010010102 is a wasteful number, since it uses less digits than its factorization.

21010010010102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19783436988 (or 19783436985 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 21010010010102 its reverse (20101001001012), we get a palindrome (41111011011114).

It can be divided in two parts, 2101001001010 and 2, that added together give a palindrome (2101001001012).

The spelling of 21010010010102 in words is "twenty-one trillion, ten billion, ten million, ten thousand, one hundred two".