21220313202 has 64 divisors (see below), whose sum is σ = 53217129600. Its totient is φ = 6208655040.

The previous prime is 21220313201. The next prime is 21220313203. The reversal of 21220313202 is 20231302212.

It is an interprime number because it is at equal distance from previous prime (21220313201) and next prime (21220313203).

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

It is not an unprimeable number, because it can be changed into a prime (21220313201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 598713 + ... + 633164.

It is an arithmetic number, because the mean of its divisors is an integer number (831517650).

Almost surely, 2^21220313202 is an apocalyptic number.

21220313202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21220313202 is an abundant number, since it is smaller than the sum of its proper divisors (31996816398).

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

21220313202 is a wasteful number, since it uses less digits than its factorization.

21220313202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231928 (or 1231922 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21220313202 its reverse (20231302212), we get a palindrome (41451615414).

The spelling of 21220313202 in words is "twenty-one billion, two hundred twenty million, three hundred thirteen thousand, two hundred two".