21202231131420 has 48 divisors (see below), whose sum is σ = 59471693527680. Its totient is φ = 5643885791296.

The previous prime is 21202231131397. The next prime is 21202231131449. The reversal of 21202231131420 is 2413113220212.

It is a super-2 number, since 2×21202231131420² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 313794390 + ... + 313861949.

It is an arithmetic number, because the mean of its divisors is an integer number (1238993615160).

Almost surely, 2^{21202231131420} is an apocalyptic number.

21202231131420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202231131420 is an abundant number, since it is smaller than the sum of its proper divisors (38269462396260).

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

21202231131420 is a wasteful number, since it uses less digits than its factorization.

21202231131420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627656914 (or 627656912 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21202231131420 its reverse (2413113220212), we get a palindrome (23615344351632).

The spelling of 21202231131420 in words is "twenty-one trillion, two hundred two billion, two hundred thirty-one million, one hundred thirty-one thousand, four hundred twenty".