21020231131300 has 36 divisors (see below), whose sum is σ = 46846709713300. Its totient is φ = 8180846709120.

The previous prime is 21020231131267. The next prime is 21020231131303. The reversal of 21020231131300 is 313113202012.

It can be written as a sum of positive squares in 6 ways, for example, as 21034861156 + 20999196270144 = 145034^2 + 4582488^2 .

It is not an unprimeable number, because it can be changed into a prime (21020231131303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2840568075 + ... + 2840575474.

Almost surely, 2^{21020231131300} is an apocalyptic number.

21020231131300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020231131300 is an abundant number, since it is smaller than the sum of its proper divisors (25826478582000).

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

21020231131300 is a wasteful number, since it uses less digits than its factorization.

21020231131300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5681143600 (or 5681143593 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21020231131300 its reverse (313113202012), we get a palindrome (21333344333312).

It can be divided in two parts, 2102023 and 1131300, that added together give a palindrome (3233323).

The spelling of 21020231131300 in words is "twenty-one trillion, twenty billion, two hundred thirty-one million, one hundred thirty-one thousand, three hundred".