121013431 has 12 divisors (see below), whose sum is σ = 152017936. Its totient is φ = 94295520.

The previous prime is 121013411. The next prime is 121013437. The reversal of 121013431 is 134310121.

It is not a de Polignac number, because 121013431 - 2⁷ = 121013303 is a prime.

It is a super-2 number, since 2×121013431² = 29288500964783522, which contains 22 as substring.

121013431 is a modest number, since divided by 13431 gives 121 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121013437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70590 + ... + 72283.

Almost surely, 2^121013431 is an apocalyptic number.

121013431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121013431 is a deficient number, since it is larger than the sum of its proper divisors (31004505).

121013431 is a wasteful number, since it uses less digits than its factorization.

121013431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142902 (or 142891 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 121013431 is about 11000.6104830596. The cubic root of 121013431 is about 494.6270441713.

Adding to 121013431 its reverse (134310121), we get a palindrome (255323552).

It can be divided in two parts, 1210 and 13431, that added together give a palindrome (14641).

The spelling of 121013431 in words is "one hundred twenty-one million, thirteen thousand, four hundred thirty-one".