612722350921 has 2 divisors, whose sum is σ = 612722350922. Its totient is φ = 612722350920.

The previous prime is 612722350909. The next prime is 612722350949. The reversal of 612722350921 is 129053227216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605525204025 + 7197146896 = 778155^2 + 84836^2 .

It is a cyclic number.

It is not a de Polignac number, because 612722350921 - 2¹¹ = 612722348873 is a prime.

It is not a weakly prime, because it can be changed into another prime (612722350901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306361175460 + 306361175461.

It is an arithmetic number, because the mean of its divisors is an integer number (306361175461).

Almost surely, 2^612722350921 is an apocalyptic number.

It is an amenable number.

612722350921 is a deficient number, since it is larger than the sum of its proper divisors (1).

612722350921 is an equidigital number, since it uses as much as digits as its factorization.

612722350921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 612722350921 in words is "six hundred twelve billion, seven hundred twenty-two million, three hundred fifty thousand, nine hundred twenty-one".