121431003 has 16 divisors (see below), whose sum is σ = 169429536. Its totient is φ = 77276160.

The previous prime is 121430993. The next prime is 121431019. The reversal of 121431003 is 300134121.

It is not a de Polignac number, because 121431003 - 2¹⁶ = 121365467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121431073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4438 + ... + 16203.

It is an arithmetic number, because the mean of its divisors is an integer number (10589346).

Almost surely, 2^121431003 is an apocalyptic number.

121431003 is a deficient number, since it is larger than the sum of its proper divisors (47998533).

121431003 is a wasteful number, since it uses less digits than its factorization.

121431003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20734.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 121431003 is about 11019.5736305903. The cubic root of 121431003 is about 495.1953152300.

Adding to 121431003 its reverse (300134121), we get a palindrome (421565124).

The spelling of 121431003 in words is "one hundred twenty-one million, four hundred thirty-one thousand, three".