121215937 has 2 divisors, whose sum is σ = 121215938. Its totient is φ = 121215936.

The previous prime is 121215917. The next prime is 121215943. The reversal of 121215937 is 739512121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100821681 + 20394256 = 10041^2 + 4516^2 .

It is a cyclic number.

It is not a de Polignac number, because 121215937 - 2¹¹ = 121213889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121215899 and 121215908.

It is not a weakly prime, because it can be changed into another prime (121215907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60607968 + 60607969.

It is an arithmetic number, because the mean of its divisors is an integer number (60607969).

Almost surely, 2^121215937 is an apocalyptic number.

It is an amenable number.

121215937 is a deficient number, since it is larger than the sum of its proper divisors (1).

121215937 is an equidigital number, since it uses as much as digits as its factorization.

121215937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 31.

The square root of 121215937 is about 11009.8109429726. The cubic root of 121215937 is about 494.9027962722.

The spelling of 121215937 in words is "one hundred twenty-one million, two hundred fifteen thousand, nine hundred thirty-seven".