121404031 has 4 divisors (see below), whose sum is σ = 138747472. Its totient is φ = 104060592.

The previous prime is 121404013. The next prime is 121404043. The reversal of 121404031 is 130404121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121404031 - 2¹⁷ = 121272959 is a prime.

It is a super-2 number, since 2×121404031² = 29477877486097922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121403996 and 121404014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121404001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8671710 + ... + 8671723.

It is an arithmetic number, because the mean of its divisors is an integer number (34686868).

Almost surely, 2^121404031 is an apocalyptic number.

121404031 is a deficient number, since it is larger than the sum of its proper divisors (17343441).

121404031 is an equidigital number, since it uses as much as digits as its factorization.

121404031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17343440.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 121404031 is about 11018.3497403196. The cubic root of 121404031 is about 495.1586485998.

Adding to 121404031 its reverse (130404121), we get a palindrome (251808152).

The spelling of 121404031 in words is "one hundred twenty-one million, four hundred four thousand, thirty-one".