6121201731257 has 2 divisors, whose sum is σ = 6121201731258. Its totient is φ = 6121201731256.

The previous prime is 6121201731217. The next prime is 6121201731269. The reversal of 6121201731257 is 7521371021216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5039558050816 + 1081643680441 = 2244896^2 + 1040021^2 .

It is a cyclic number.

It is not a de Polignac number, because 6121201731257 - 2¹⁰ = 6121201730233 is a prime.

It is a super-2 number, since 2×6121201731257² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6121201731257.

It is not a weakly prime, because it can be changed into another prime (6121201731217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3060600865628 + 3060600865629.

It is an arithmetic number, because the mean of its divisors is an integer number (3060600865629).

Almost surely, 2^{6121201731257} is an apocalyptic number.

It is an amenable number.

6121201731257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6121201731257 is an equidigital number, since it uses as much as digits as its factorization.

6121201731257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 6121201731257 in words is "six trillion, one hundred twenty-one billion, two hundred one million, seven hundred thirty-one thousand, two hundred fifty-seven".