30121043664757 has 2 divisors, whose sum is σ = 30121043664758. Its totient is φ = 30121043664756.

The previous prime is 30121043664727. The next prime is 30121043664763. The reversal of 30121043664757 is 75746634012103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26997231324996 + 3123812339761 = 5195886^2 + 1767431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30121043664757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30121043664757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30121043664727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060521832378 + 15060521832379.

It is an arithmetic number, because the mean of its divisors is an integer number (15060521832379).

Almost surely, 2^{30121043664757} is an apocalyptic number.

It is an amenable number.

30121043664757 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121043664757 is an equidigital number, since it uses as much as digits as its factorization.

30121043664757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 49.

The spelling of 30121043664757 in words is "thirty trillion, one hundred twenty-one billion, forty-three million, six hundred sixty-four thousand, seven hundred fifty-seven".