202131311323220 has 96 divisors (see below), whose sum is σ = 451769321203200. Its totient is φ = 75703055155200.

The previous prime is 202131311323199. The next prime is 202131311323231. The reversal of 202131311323220 is 22323113131202.

It is a super-2 number, since 2×202131311323220² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202131311323220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 471172820 + ... + 471601620.

It is an arithmetic number, because the mean of its divisors is an integer number (4705930429200).

Almost surely, 2^{202131311323220} is an apocalyptic number.

202131311323220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202131311323220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225884660601600).

202131311323220 is an abundant number, since it is smaller than the sum of its proper divisors (249638009879980).

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

202131311323220 is a wasteful number, since it uses less digits than its factorization.

202131311323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435993 (or 435991 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 202131311323220 its reverse (22323113131202), we get a palindrome (224454424454422).

The spelling of 202131311323220 in words is "two hundred two trillion, one hundred thirty-one billion, three hundred eleven million, three hundred twenty-three thousand, two hundred twenty".