121152431 has 4 divisors (see below), whose sum is σ = 126419952. Its totient is φ = 115884912.

The previous prime is 121152403. The next prime is 121152461. The reversal of 121152431 is 134251121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134251121 = 29 ⋅4629349.

It is a cyclic number.

It is not a de Polignac number, because 121152431 - 2¹⁴ = 121136047 is a prime.

It is a super-2 number, since 2×121152431² = 29355823074419522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121152461) 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, 2633726 + ... + 2633771.

It is an arithmetic number, because the mean of its divisors is an integer number (31604988).

Almost surely, 2^121152431 is an apocalyptic number.

121152431 is a deficient number, since it is larger than the sum of its proper divisors (5267521).

121152431 is an equidigital number, since it uses as much as digits as its factorization.

121152431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5267520.

The product of its digits is 240, while the sum is 20.

The square root of 121152431 is about 11006.9265010720. The cubic root of 121152431 is about 494.8163533285.

The spelling of 121152431 in words is "one hundred twenty-one million, one hundred fifty-two thousand, four hundred thirty-one".