12152439961 has 2 divisors, whose sum is σ = 12152439962. Its totient is φ = 12152439960.

The previous prime is 12152439911. The next prime is 12152439973. The reversal of 12152439961 is 16993425121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8652534361 + 3499905600 = 93019^2 + 59160^2 .

It is an emirp because it is prime and its reverse (16993425121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12152439961 - 2¹³ = 12152431769 is a prime.

It is a super-3 number, since 3×12152439961³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (12152439911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6076219980 + 6076219981.

It is an arithmetic number, because the mean of its divisors is an integer number (6076219981).

Almost surely, 2^12152439961 is an apocalyptic number.

It is an amenable number.

12152439961 is a deficient number, since it is larger than the sum of its proper divisors (1).

12152439961 is an equidigital number, since it uses as much as digits as its factorization.

12152439961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 43.

The spelling of 12152439961 in words is "twelve billion, one hundred fifty-two million, four hundred thirty-nine thousand, nine hundred sixty-one".