21031220013202 has 24 divisors (see below), whose sum is σ = 36698349507840. Its totient is φ = 9013130307720.

The previous prime is 21031220013179. The next prime is 21031220013203. The reversal of 21031220013202 is 20231002213012.

It is a self number, because there is not a number n which added to its sum of digits gives 21031220013202.

It is not an unprimeable number, because it can be changed into a prime (21031220013203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 604827 + ... + 6513697.

It is an arithmetic number, because the mean of its divisors is an integer number (1529097896160).

Almost surely, 2^{21031220013202} is an apocalyptic number.

21031220013202 is a deficient number, since it is larger than the sum of its proper divisors (15667129494638).

21031220013202 is a wasteful number, since it uses less digits than its factorization.

21031220013202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5945206 (or 5945199 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21031220013202 its reverse (20231002213012), we get a palindrome (41262222226214).

The spelling of 21031220013202 in words is "twenty-one trillion, thirty-one billion, two hundred twenty million, thirteen thousand, two hundred two".