21031331202 has 48 divisors (see below), whose sum is σ = 52593233472. Its totient is φ = 5949453600.

The previous prime is 21031331197. The next prime is 21031331213. The reversal of 21031331202 is 20213313012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 813588 + ... + 839039.

It is an arithmetic number, because the mean of its divisors is an integer number (1095692364).

Almost surely, 2^21031331202 is an apocalyptic number.

21031331202 is an abundant number, since it is smaller than the sum of its proper divisors (31561902270).

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

21031331202 is a wasteful number, since it uses less digits than its factorization.

21031331202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652743 (or 1652740 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21031331202 its reverse (20213313012), we get a palindrome (41244644214).

The spelling of 21031331202 in words is "twenty-one billion, thirty-one million, three hundred thirty-one thousand, two hundred two".