121031018137 has 2 divisors, whose sum is σ = 121031018138. Its totient is φ = 121031018136.

The previous prime is 121031018113. The next prime is 121031018231. The reversal of 121031018137 is 731810130121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117007780096 + 4023238041 = 342064^2 + 63429^2 .

It is a cyclic number.

It is not a de Polignac number, because 121031018137 - 2²³ = 121022629529 is a prime.

It is not a weakly prime, because it can be changed into another prime (121031618137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60515509068 + 60515509069.

It is an arithmetic number, because the mean of its divisors is an integer number (60515509069).

Almost surely, 2^121031018137 is an apocalyptic number.

It is an amenable number.

121031018137 is a deficient number, since it is larger than the sum of its proper divisors (1).

121031018137 is an equidigital number, since it uses as much as digits as its factorization.

121031018137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

Adding to 121031018137 its reverse (731810130121), we get a palindrome (852841148258).

The spelling of 121031018137 in words is "one hundred twenty-one billion, thirty-one million, eighteen thousand, one hundred thirty-seven".