121970939 has 2 divisors, whose sum is σ = 121970940. Its totient is φ = 121970938.

The previous prime is 121970929. The next prime is 121970951. The reversal of 121970939 is 939079121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121970939 - 2⁴ = 121970923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121970896 and 121970905.

It is not a weakly prime, because it can be changed into another prime (121970929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60985469 + 60985470.

It is an arithmetic number, because the mean of its divisors is an integer number (60985470).

Almost surely, 2^121970939 is an apocalyptic number.

121970939 is a deficient number, since it is larger than the sum of its proper divisors (1).

121970939 is an equidigital number, since it uses as much as digits as its factorization.

121970939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 121970939 is about 11044.0454091786. The cubic root of 121970939 is about 495.9281826191.

The spelling of 121970939 in words is "one hundred twenty-one million, nine hundred seventy thousand, nine hundred thirty-nine".