21210531202 has 32 divisors (see below), whose sum is σ = 38510888832. Its totient is φ = 8553041664.

The previous prime is 21210531157. The next prime is 21210531263. The reversal of 21210531202 is 20213501212.

It is a self number, because there is not a number n which added to its sum of digits gives 21210531202.

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, 972873 + ... + 994435.

It is an arithmetic number, because the mean of its divisors is an integer number (1203465276).

Almost surely, 2^21210531202 is an apocalyptic number.

21210531202 is a deficient number, since it is larger than the sum of its proper divisors (17300357630).

21210531202 is a wasteful number, since it uses less digits than its factorization.

21210531202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25722.

The product of its (nonzero) digits is 240, while the sum is 19.

The spelling of 21210531202 in words is "twenty-one billion, two hundred ten million, five hundred thirty-one thousand, two hundred two".