12211621625 has 16 divisors (see below), whose sum is σ = 17417262720. Its totient is φ = 8373682800.

The previous prime is 12211621621. The next prime is 12211621691. The reversal of 12211621625 is 52612611221.

It is not a de Polignac number, because 12211621625 - 2² = 12211621621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12211621621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6977195 + ... + 6978944.

It is an arithmetic number, because the mean of its divisors is an integer number (1088578920).

Almost surely, 2^12211621625 is an apocalyptic number.

It is an amenable number.

12211621625 is a deficient number, since it is larger than the sum of its proper divisors (5205641095).

12211621625 is an equidigital number, since it uses as much as digits as its factorization.

12211621625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13956161 (or 13956151 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The spelling of 12211621625 in words is "twelve billion, two hundred eleven million, six hundred twenty-one thousand, six hundred twenty-five".