121431896 has 16 divisors (see below), whose sum is σ = 229940640. Its totient is φ = 60114400.

The previous prime is 121431889. The next prime is 121431899. The reversal of 121431896 is 698134121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121431899) 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, 74336 + ... + 75951.

It is an arithmetic number, because the mean of its divisors is an integer number (14371290).

Almost surely, 2^121431896 is an apocalyptic number.

It is an amenable number.

121431896 is a deficient number, since it is larger than the sum of its proper divisors (108508744).

121431896 is a wasteful number, since it uses less digits than its factorization.

121431896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150394 (or 150390 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 121431896 is about 11019.6141493248. The cubic root of 121431896 is about 495.1965291109.

The spelling of 121431896 in words is "one hundred twenty-one million, four hundred thirty-one thousand, eight hundred ninety-six".