121976427 has 4 divisors (see below), whose sum is σ = 162635240. Its totient is φ = 81317616.

The previous prime is 121976419. The next prime is 121976431. The reversal of 121976427 is 724679121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121976427 - 2³ = 121976419 is a prime.

It is a super-5 number, since 5×121976427⁵ (a number of 42 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121976417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20329402 + ... + 20329407.

It is an arithmetic number, because the mean of its divisors is an integer number (40658810).

Almost surely, 2^121976427 is an apocalyptic number.

121976427 is a deficient number, since it is larger than the sum of its proper divisors (40658813).

121976427 is an equidigital number, since it uses as much as digits as its factorization.

121976427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40658812.

The product of its digits is 42336, while the sum is 39.

The square root of 121976427 is about 11044.2938660650. The cubic root of 121976427 is about 495.9356204921.

The spelling of 121976427 in words is "one hundred twenty-one million, nine hundred seventy-six thousand, four hundred twenty-seven".