130423212520 has 32 divisors (see below), whose sum is σ = 294293097000. Its totient is φ = 52019797248.

The previous prime is 130423212499. The next prime is 130423212529. The reversal of 130423212520 is 25212324031.

It can be written as a sum of positive squares in 4 ways, for example, as 79480014084 + 50943198436 = 281922^2 + 225706^2 .

It is not an unprimeable number, because it can be changed into a prime (130423212529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4657359 + ... + 4685278.

Almost surely, 2^130423212520 is an apocalyptic number.

130423212520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130423212520 is an abundant number, since it is smaller than the sum of its proper divisors (163869884480).

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

130423212520 is a wasteful number, since it uses less digits than its factorization.

130423212520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9342997 (or 9342993 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 130423212520 its reverse (25212324031), we get a palindrome (155635536551).

The spelling of 130423212520 in words is "one hundred thirty billion, four hundred twenty-three million, two hundred twelve thousand, five hundred twenty".