121351431 has 8 divisors (see below), whose sum is σ = 165748464. Its totient is φ = 78927680.

The previous prime is 121351393. The next prime is 121351441. The reversal of 121351431 is 134153121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121351431 - 2⁹ = 121350919 is a prime.

It is a super-2 number, since 2×121351431² = 29452339611495522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121351398 and 121351407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121351441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493176 + ... + 493421.

It is an arithmetic number, because the mean of its divisors is an integer number (20718558).

Almost surely, 2^121351431 is an apocalyptic number.

121351431 is a deficient number, since it is larger than the sum of its proper divisors (44397033).

121351431 is an equidigital number, since it uses as much as digits as its factorization.

121351431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986641.

The product of its digits is 360, while the sum is 21.

The square root of 121351431 is about 11015.9625544026. The cubic root of 121351431 is about 495.0871267919.

The spelling of 121351431 in words is "one hundred twenty-one million, three hundred fifty-one thousand, four hundred thirty-one".