12621420867 has 32 divisors (see below), whose sum is σ = 19262670336. Its totient is φ = 7276262400.

The previous prime is 12621420839. The next prime is 12621420887. The reversal of 12621420867 is 76802412621.

It is not a de Polignac number, because 12621420867 - 2⁸ = 12621420611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12621420827) 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, 91443 + ... + 183315.

It is an arithmetic number, because the mean of its divisors is an integer number (601958448).

Almost surely, 2^12621420867 is an apocalyptic number.

12621420867 is a deficient number, since it is larger than the sum of its proper divisors (6641249469).

12621420867 is a wasteful number, since it uses less digits than its factorization.

12621420867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92091.

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 12621420867 in words is "twelve billion, six hundred twenty-one million, four hundred twenty thousand, eight hundred sixty-seven".