21002021211102 has 16 divisors (see below), whose sum is σ = 42004319074560. Its totient is φ = 7000627628312.

The previous prime is 21002021211019. The next prime is 21002021211131. The reversal of 21002021211102 is 20111212020012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10533702 + ... + 12367817.

It is an arithmetic number, because the mean of its divisors is an integer number (2625269942160).

Almost surely, 2^{21002021211102} is an apocalyptic number.

21002021211102 is an abundant number, since it is smaller than the sum of its proper divisors (21002297863458).

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

21002021211102 is a wasteful number, since it uses less digits than its factorization.

21002021211102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23054367.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21002021211102 its reverse (20111212020012), we get a palindrome (41113233231114).

The spelling of 21002021211102 in words is "twenty-one trillion, two billion, twenty-one million, two hundred eleven thousand, one hundred two".