12104721265 has 16 divisors (see below), whose sum is σ = 17877742848. Its totient is φ = 7661889216.

The previous prime is 12104721263. The next prime is 12104721289. The reversal of 12104721265 is 56212740121.

It is a cyclic number.

It is not a de Polignac number, because 12104721265 - 2¹ = 12104721263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12104721263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13301437 + ... + 13302346.

It is an arithmetic number, because the mean of its divisors is an integer number (1117358928).

Almost surely, 2^12104721265 is an apocalyptic number.

It is an amenable number.

12104721265 is a deficient number, since it is larger than the sum of its proper divisors (5773021583).

12104721265 is a wasteful number, since it uses less digits than its factorization.

12104721265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26603808.

The product of its (nonzero) digits is 6720, while the sum is 31.

The spelling of 12104721265 in words is "twelve billion, one hundred four million, seven hundred twenty-one thousand, two hundred sixty-five".