121588134257 has 2 divisors, whose sum is σ = 121588134258. Its totient is φ = 121588134256.

The previous prime is 121588134223. The next prime is 121588134263. The reversal of 121588134257 is 752431885121.

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., 119936849761 + 1651284496 = 346319^2 + 40636^2 .

It is a cyclic number.

It is not a de Polignac number, because 121588134257 - 2¹⁴ = 121588117873 is a prime.

It is not a weakly prime, because it can be changed into another prime (121588134277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60794067128 + 60794067129.

It is an arithmetic number, because the mean of its divisors is an integer number (60794067129).

Almost surely, 2^121588134257 is an apocalyptic number.

It is an amenable number.

121588134257 is a deficient number, since it is larger than the sum of its proper divisors (1).

121588134257 is an equidigital number, since it uses as much as digits as its factorization.

121588134257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 537600, while the sum is 47.

The spelling of 121588134257 in words is "one hundred twenty-one billion, five hundred eighty-eight million, one hundred thirty-four thousand, two hundred fifty-seven".