21313121202 has 48 divisors (see below), whose sum is σ = 46880570880. Its totient is φ = 6997092000.

The previous prime is 21313121197. The next prime is 21313121227. The reversal of 21313121202 is 20212131312.

It is a super-2 number, since 2×21313121202² (a number of 21 digits) contains 22 as substring.

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, 316549 + ... + 377927.

It is an arithmetic number, because the mean of its divisors is an integer number (976678560).

Almost surely, 2^21313121202 is an apocalyptic number.

21313121202 is an abundant number, since it is smaller than the sum of its proper divisors (25567449678).

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

21313121202 is a wasteful number, since it uses less digits than its factorization.

21313121202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61679 (or 61676 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21313121202 its reverse (20212131312), we get a palindrome (41525252514).

The spelling of 21313121202 in words is "twenty-one billion, three hundred thirteen million, one hundred twenty-one thousand, two hundred two".