21105071202 has 16 divisors (see below), whose sum is σ = 42325160832. Its totient is φ = 7015854000.

The previous prime is 21105071179. The next prime is 21105071249. The reversal of 21105071202 is 20217050112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4790049 + ... + 4794452.

It is an arithmetic number, because the mean of its divisors is an integer number (2645322552).

Almost surely, 2^21105071202 is an apocalyptic number.

21105071202 is an abundant number, since it is smaller than the sum of its proper divisors (21220089630).

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

21105071202 is a wasteful number, since it uses less digits than its factorization.

21105071202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9584873.

The product of its (nonzero) digits is 280, while the sum is 21.

The spelling of 21105071202 in words is "twenty-one billion, one hundred five million, seventy-one thousand, two hundred two".