121296987 has 32 divisors (see below), whose sum is σ = 206300160. Its totient is φ = 68999040.

The previous prime is 121296977. The next prime is 121296997. The reversal of 121296987 is 789692121.

It is an interprime number because it is at equal distance from previous prime (121296977) and next prime (121296997).

It is not a de Polignac number, because 121296987 - 2¹² = 121292891 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (121296907) 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, 44218 + ... + 46880.

It is an arithmetic number, because the mean of its divisors is an integer number (6446880).

Almost surely, 2^121296987 is an apocalyptic number.

121296987 is a deficient number, since it is larger than the sum of its proper divisors (85003173).

121296987 is a wasteful number, since it uses less digits than its factorization.

121296987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920 (or 2914 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 121296987 is about 11013.4911358751. The cubic root of 121296987 is about 495.0130758713.

The spelling of 121296987 in words is "one hundred twenty-one million, two hundred ninety-six thousand, nine hundred eighty-seven".