12162737621 has 2 divisors, whose sum is σ = 12162737622. Its totient is φ = 12162737620.

The previous prime is 12162737611. The next prime is 12162737623. The reversal of 12162737621 is 12673726121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11329260721 + 833476900 = 106439^2 + 28870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12162737621 is a prime.

Together with 12162737623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12162737623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6081368810 + 6081368811.

It is an arithmetic number, because the mean of its divisors is an integer number (6081368811).

Almost surely, 2^12162737621 is an apocalyptic number.

It is an amenable number.

12162737621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12162737621 is an equidigital number, since it uses as much as digits as its factorization.

12162737621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 38.

The spelling of 12162737621 in words is "twelve billion, one hundred sixty-two million, seven hundred thirty-seven thousand, six hundred twenty-one".