13120322500 has 30 divisors (see below), whose sum is σ = 28691526710. Its totient is φ = 5248128000.

The previous prime is 13120322471. The next prime is 13120322519. The reversal of 13120322500 is 522302131.

It can be written as a sum of positive squares in 5 ways, for example, as 1816805376 + 11303517124 = 42624^2 + 106318^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2621565 + ... + 2626564.

Almost surely, 2^13120322500 is an apocalyptic number.

13120322500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13120322500 is an abundant number, since it is smaller than the sum of its proper divisors (15571204210).

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

13120322500 is an equidigital number, since it uses as much as digits as its factorization.

13120322500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248153 (or 5248136 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 13120322500 its reverse (522302131), we get a palindrome (13642624631).

The spelling of 13120322500 in words is "thirteen billion, one hundred twenty million, three hundred twenty-two thousand, five hundred".