12730121670 has 32 divisors (see below), whose sum is σ = 34916905728. Its totient is φ = 2909742048.

The previous prime is 12730121669. The next prime is 12730121681. The reversal of 12730121670 is 7612103721.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30309604 + ... + 30310023.

It is an arithmetic number, because the mean of its divisors is an integer number (1091153304).

Almost surely, 2^12730121670 is an apocalyptic number.

12730121670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12730121670 is an abundant number, since it is smaller than the sum of its proper divisors (22186784058).

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

12730121670 is a wasteful number, since it uses less digits than its factorization.

12730121670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60619644.

The product of its (nonzero) digits is 3528, while the sum is 30.

The spelling of 12730121670 in words is "twelve billion, seven hundred thirty million, one hundred twenty-one thousand, six hundred seventy".