121251142 has 16 divisors (see below), whose sum is σ = 186956352. Its totient is φ = 58945320.

The previous prime is 121251139. The next prime is 121251209. The reversal of 121251142 is 241152121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16417 + ... + 22627.

It is an arithmetic number, because the mean of its divisors is an integer number (11684772).

Almost surely, 2^121251142 is an apocalyptic number.

121251142 is a deficient number, since it is larger than the sum of its proper divisors (65705210).

121251142 is a wasteful number, since it uses less digits than its factorization.

121251142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6483.

The product of its digits is 160, while the sum is 19.

The square root of 121251142 is about 11011.4096281993. The cubic root of 121251142 is about 494.9507035219.

The spelling of 121251142 in words is "one hundred twenty-one million, two hundred fifty-one thousand, one hundred forty-two".