21231321131130 has 128 divisors (see below), whose sum is σ = 59116344376320. Its totient is φ = 4825823754240.

The previous prime is 21231321131081. The next prime is 21231321131131. The reversal of 21231321131130 is 3113112313212.

It is a super-3 number, since 3×21231321131130³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21231321131130.

It is not an unprimeable number, because it can be changed into a prime (21231321131131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16846324 + ... + 18062703.

It is an arithmetic number, because the mean of its divisors is an integer number (461846440440).

Almost surely, 2^{21231321131130} is an apocalyptic number.

21231321131130 is an abundant number, since it is smaller than the sum of its proper divisors (37885023245190).

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

21231321131130 is a wasteful number, since it uses less digits than its factorization.

21231321131130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34909164.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 21231321131130 its reverse (3113112313212), we get a palindrome (24344433444342).

The spelling of 21231321131130 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred twenty-one million, one hundred thirty-one thousand, one hundred thirty".