121531052132137 has 2 divisors, whose sum is σ = 121531052132138. Its totient is φ = 121531052132136.

The previous prime is 121531052132111. The next prime is 121531052132179. The reversal of 121531052132137 is 731231250135121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115200272793321 + 6330779338816 = 10733139^2 + 2516104^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121531052132137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121531052132096 and 121531052132105.

It is not a weakly prime, because it can be changed into another prime (121531052432137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60765526066068 + 60765526066069.

It is an arithmetic number, because the mean of its divisors is an integer number (60765526066069).

Almost surely, 2^{121531052132137} is an apocalyptic number.

It is an amenable number.

121531052132137 is a deficient number, since it is larger than the sum of its proper divisors (1).

121531052132137 is an equidigital number, since it uses as much as digits as its factorization.

121531052132137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 121531052132137 in words is "one hundred twenty-one trillion, five hundred thirty-one billion, fifty-two million, one hundred thirty-two thousand, one hundred thirty-seven".