121305431 has 8 divisors (see below), whose sum is σ = 130722480. Its totient is φ = 111900672.

The previous prime is 121305409. The next prime is 121305461. The reversal of 121305431 is 134503121.

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

It is not a de Polignac number, because 121305431 - 2²⁶ = 54196567 is a prime.

It is a super-2 number, since 2×121305431² = 29430015180191522, 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 (121305461) 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, 34775 + ... + 38103.

It is an arithmetic number, because the mean of its divisors is an integer number (16340310).

Almost surely, 2^121305431 is an apocalyptic number.

121305431 is a deficient number, since it is larger than the sum of its proper divisors (9417049).

121305431 is a wasteful number, since it uses less digits than its factorization.

121305431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6145.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 121305431 is about 11013.8744772219. The cubic root of 121305431 is about 495.0245622611.

Adding to 121305431 its reverse (134503121), we get a palindrome (255808552).

The spelling of 121305431 in words is "one hundred twenty-one million, three hundred five thousand, four hundred thirty-one".