121296989 has 32 divisors (see below), whose sum is σ = 147350016. Its totient is φ = 98565120.

The previous prime is 121296977. The next prime is 121296997. The reversal of 121296989 is 989692121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121296989 is a prime.

It is a super-2 number, since 2×121296989² = 29425919080932242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121296689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 325007 + ... + 325379.

It is an arithmetic number, because the mean of its divisors is an integer number (4604688).

Almost surely, 2^121296989 is an apocalyptic number.

It is an amenable number.

121296989 is a deficient number, since it is larger than the sum of its proper divisors (26053027).

121296989 is a wasteful number, since it uses less digits than its factorization.

121296989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485.

The product of its digits is 139968, while the sum is 47.

The square root of 121296989 is about 11013.4912266729. The cubic root of 121296989 is about 495.0130785920.

The spelling of 121296989 in words is "one hundred twenty-one million, two hundred ninety-six thousand, nine hundred eighty-nine".