21312330130 has 64 divisors (see below), whose sum is σ = 48366678528. Its totient is φ = 6580477440.

The previous prime is 21312330113. The next prime is 21312330139. The reversal of 21312330130 is 3103321312.

It is a junction number, because it is equal to n+sod(n) for n = 21312330098 and 21312330107.

It is not an unprimeable number, because it can be changed into a prime (21312330139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248302 + ... + 322921.

It is an arithmetic number, because the mean of its divisors is an integer number (755729352).

Almost surely, 2^21312330130 is an apocalyptic number.

21312330130 is an abundant number, since it is smaller than the sum of its proper divisors (27054348398).

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

21312330130 is a wasteful number, since it uses less digits than its factorization.

21312330130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571291.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21312330130 its reverse (3103321312), we get a palindrome (24415651442).

It can be divided in two parts, 213123 and 30130, that added together give a triangular number (243253 = T₆₉₇).

The spelling of 21312330130 in words is "twenty-one billion, three hundred twelve million, three hundred thirty thousand, one hundred thirty".