121345431 has 12 divisors (see below), whose sum is σ = 163107576. Its totient is φ = 80245360.

The previous prime is 121345423. The next prime is 121345453. The reversal of 121345431 is 134543121.

It is a happy number.

It is not a de Polignac number, because 121345431 - 2³ = 121345423 is a prime.

It is a super-2 number, since 2×121345431² = 29449427249151522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121345481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50305 + ... + 52661.

It is an arithmetic number, because the mean of its divisors is an integer number (13592298).

Almost surely, 2^121345431 is an apocalyptic number.

121345431 is a deficient number, since it is larger than the sum of its proper divisors (41762145).

121345431 is an equidigital number, since it uses as much as digits as its factorization.

121345431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622 (or 2491 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 121345431 is about 11015.6902189559. The cubic root of 121345431 is about 495.0789670977.

Adding to 121345431 its reverse (134543121), we get a palindrome (255888552).

The spelling of 121345431 in words is "one hundred twenty-one million, three hundred forty-five thousand, four hundred thirty-one".