121590348157 has 4 divisors (see below), whose sum is σ = 128742721596. Its totient is φ = 114437974720.

The previous prime is 121590348073. The next prime is 121590348161. The reversal of 121590348157 is 751843095121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102672821476 + 18917526681 = 320426^2 + 137541^2 .

It is a cyclic number.

It is not a de Polignac number, because 121590348157 - 2⁷ = 121590348029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121590348197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3576186694 + ... + 3576186727.

It is an arithmetic number, because the mean of its divisors is an integer number (32185680399).

Almost surely, 2^121590348157 is an apocalyptic number.

121590348157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

121590348157 is a deficient number, since it is larger than the sum of its proper divisors (7152373439).

121590348157 is an equidigital number, since it uses as much as digits as its factorization.

121590348157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7152373438.

The product of its (nonzero) digits is 302400, while the sum is 46.

The spelling of 121590348157 in words is "one hundred twenty-one billion, five hundred ninety million, three hundred forty-eight thousand, one hundred fifty-seven".