12351321761 has 2 divisors, whose sum is σ = 12351321762. Its totient is φ = 12351321760.

The previous prime is 12351321737. The next prime is 12351321767. The reversal of 12351321761 is 16712315321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11000024161 + 1351297600 = 104881^2 + 36760^2 .

It is a cyclic number.

It is not a de Polignac number, because 12351321761 - 2¹⁴ = 12351305377 is a prime.

It is a super-2 number, since 2×12351321761² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12351321767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6175660880 + 6175660881.

It is an arithmetic number, because the mean of its divisors is an integer number (6175660881).

Almost surely, 2^12351321761 is an apocalyptic number.

It is an amenable number.

12351321761 is a deficient number, since it is larger than the sum of its proper divisors (1).

12351321761 is an equidigital number, since it uses as much as digits as its factorization.

12351321761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 32.

The spelling of 12351321761 in words is "twelve billion, three hundred fifty-one million, three hundred twenty-one thousand, seven hundred sixty-one".