157481322121 has 2 divisors, whose sum is σ = 157481322122. Its totient is φ = 157481322120.

The previous prime is 157481322071. The next prime is 157481322139. The reversal of 157481322121 is 121223184751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149165888400 + 8315433721 = 386220^2 + 91189^2 .

It is a cyclic number.

It is not a de Polignac number, because 157481322121 - 2¹⁵ = 157481289353 is a prime.

It is not a weakly prime, because it can be changed into another prime (157481329121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78740661060 + 78740661061.

It is an arithmetic number, because the mean of its divisors is an integer number (78740661061).

Almost surely, 2^157481322121 is an apocalyptic number.

It is an amenable number.

157481322121 is a deficient number, since it is larger than the sum of its proper divisors (1).

157481322121 is an equidigital number, since it uses as much as digits as its factorization.

157481322121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The spelling of 157481322121 in words is "one hundred fifty-seven billion, four hundred eighty-one million, three hundred twenty-two thousand, one hundred twenty-one".