21231132130 has 64 divisors (see below), whose sum is σ = 43082274816. Its totient is φ = 7479360000.

The previous prime is 21231132127. The next prime is 21231132149. The reversal of 21231132130 is 3123113212.

It is a junction number, because it is equal to n+sod(n) for n = 21231132098 and 21231132107.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249030 + ... + 323230.

It is an arithmetic number, because the mean of its divisors is an integer number (673160544).

Almost surely, 2^21231132130 is an apocalyptic number.

21231132130 is an abundant number, since it is smaller than the sum of its proper divisors (21851142686).

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

21231132130 is a wasteful number, since it uses less digits than its factorization.

21231132130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74323.

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

Adding to 21231132130 its reverse (3123113212), we get a palindrome (24354245342).

The spelling of 21231132130 in words is "twenty-one billion, two hundred thirty-one million, one hundred thirty-two thousand, one hundred thirty".