121316537 has 2 divisors, whose sum is σ = 121316538. Its totient is φ = 121316536.

The previous prime is 121316521. The next prime is 121316557. The reversal of 121316537 is 735613121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68376361 + 52940176 = 8269^2 + 7276^2 .

It is a cyclic number.

It is not a de Polignac number, because 121316537 - 2⁴ = 121316521 is a prime.

It is not a weakly prime, because it can be changed into another prime (121316557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60658268 + 60658269.

It is an arithmetic number, because the mean of its divisors is an integer number (60658269).

Almost surely, 2^121316537 is an apocalyptic number.

It is an amenable number.

121316537 is a deficient number, since it is larger than the sum of its proper divisors (1).

121316537 is an equidigital number, since it uses as much as digits as its factorization.

121316537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 29.

The square root of 121316537 is about 11014.3786479311. The cubic root of 121316537 is about 495.0396689632.

Adding to 121316537 its reverse (735613121), we get a palindrome (856929658).

The spelling of 121316537 in words is "one hundred twenty-one million, three hundred sixteen thousand, five hundred thirty-seven".