12715620621 has 8 divisors (see below), whose sum is σ = 18495448224. Its totient is φ = 7706436720.

The previous prime is 12715620523. The next prime is 12715620653. The reversal of 12715620621 is 12602651721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12715620621 - 2¹⁰ = 12715619597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 385321837 = 12715620621 / (1 + 2 + 7 + 1 + 5 + 6 + 2 + 0 + 6 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12715620221) 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, 192660886 + ... + 192660951.

It is an arithmetic number, because the mean of its divisors is an integer number (2311931028).

Almost surely, 2^12715620621 is an apocalyptic number.

12715620621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12715620621 is a deficient number, since it is larger than the sum of its proper divisors (5779827603).

12715620621 is a wasteful number, since it uses less digits than its factorization.

12715620621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385321851.

The product of its (nonzero) digits is 10080, while the sum is 33.

It can be divided in two parts, 12715 and 620621, that added together give a palindrome (633336).

The spelling of 12715620621 in words is "twelve billion, seven hundred fifteen million, six hundred twenty thousand, six hundred twenty-one".