2123115536257 has 2 divisors, whose sum is σ = 2123115536258. Its totient is φ = 2123115536256.

The previous prime is 2123115536239. The next prime is 2123115536273. The reversal of 2123115536257 is 7526355113212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1493574850161 + 629540686096 = 1222119^2 + 793436^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123115536257 - 2¹¹ = 2123115534209 is a prime.

It is not a weakly prime, because it can be changed into another prime (2123115536057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061557768128 + 1061557768129.

It is an arithmetic number, because the mean of its divisors is an integer number (1061557768129).

Almost surely, 2^{2123115536257} is an apocalyptic number.

It is an amenable number.

2123115536257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123115536257 is an equidigital number, since it uses as much as digits as its factorization.

2123115536257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 43.

The spelling of 2123115536257 in words is "two trillion, one hundred twenty-three billion, one hundred fifteen million, five hundred thirty-six thousand, two hundred fifty-seven".