121490969 has 2 divisors, whose sum is σ = 121490970. Its totient is φ = 121490968.

The previous prime is 121490939. The next prime is 121490987. The reversal of 121490969 is 969094121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94575625 + 26915344 = 9725^2 + 5188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121490969 is a prime.

It is a super-2 number, since 2×121490969² = 29520111097117922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (121490939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60745484 + 60745485.

It is an arithmetic number, because the mean of its divisors is an integer number (60745485).

Almost surely, 2^121490969 is an apocalyptic number.

It is an amenable number.

121490969 is a deficient number, since it is larger than the sum of its proper divisors (1).

121490969 is an equidigital number, since it uses as much as digits as its factorization.

121490969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 121490969 is about 11022.2941804327. The cubic root of 121490969 is about 495.2768155466.

The spelling of 121490969 in words is "one hundred twenty-one million, four hundred ninety thousand, nine hundred sixty-nine".