21101011202012 has 48 divisors (see below), whose sum is σ = 44425213728000. Its totient is φ = 8566935922944.

The previous prime is 21101011201931. The next prime is 21101011202099. The reversal of 21101011202012 is 21020211010112.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

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, 10876439 + ... + 12668817.

It is an arithmetic number, because the mean of its divisors is an integer number (925525286000).

Almost surely, 2^{21101011202012} is an apocalyptic number.

It is an amenable number.

21101011202012 is an abundant number, since it is smaller than the sum of its proper divisors (23324202525988).

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

21101011202012 is a wasteful number, since it uses less digits than its factorization.

21101011202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814538 (or 1814536 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21101011202012 its reverse (21020211010112), we get a palindrome (42121222212124).

The spelling of 21101011202012 in words is "twenty-one trillion, one hundred one billion, eleven million, two hundred two thousand, twelve".