12755026621 has 2 divisors, whose sum is σ = 12755026622. Its totient is φ = 12755026620.

The previous prime is 12755026597. The next prime is 12755026631. The reversal of 12755026621 is 12662055721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11099676025 + 1655350596 = 105355^2 + 40686^2 .

It is a cyclic number.

It is not a de Polignac number, because 12755026621 - 2¹³ = 12755018429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12755026631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6377513310 + 6377513311.

It is an arithmetic number, because the mean of its divisors is an integer number (6377513311).

Almost surely, 2^12755026621 is an apocalyptic number.

It is an amenable number.

12755026621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12755026621 is an equidigital number, since it uses as much as digits as its factorization.

12755026621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 12755026621 in words is "twelve billion, seven hundred fifty-five million, twenty-six thousand, six hundred twenty-one".