12240621671 has 4 divisors (see below), whose sum is σ = 12240882744. Its totient is φ = 12240360600.

The previous prime is 12240621647. The next prime is 12240621683. The reversal of 12240621671 is 17612604221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12240621671 - 2¹⁰ = 12240620647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12240621271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38645 + ... + 161166.

It is an arithmetic number, because the mean of its divisors is an integer number (3060220686).

Almost surely, 2^12240621671 is an apocalyptic number.

12240621671 is a deficient number, since it is larger than the sum of its proper divisors (261073).

12240621671 is an equidigital number, since it uses as much as digits as its factorization.

12240621671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261072.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 12240621671 in words is "twelve billion, two hundred forty million, six hundred twenty-one thousand, six hundred seventy-one".