121312442 has 32 divisors (see below), whose sum is σ = 204913152. Its totient is φ = 53557504.

The previous prime is 121312409. The next prime is 121312447. The reversal of 121312442 is 244213121.

It is not an unprimeable number, because it can be changed into a prime (121312447) 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, 39983 + ... + 42909.

It is an arithmetic number, because the mean of its divisors is an integer number (6403536).

Almost surely, 2^121312442 is an apocalyptic number.

121312442 is a deficient number, since it is larger than the sum of its proper divisors (83600710).

121312442 is a wasteful number, since it uses less digits than its factorization.

121312442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3022.

The product of its digits is 384, while the sum is 20.

The square root of 121312442 is about 11014.1927529892. The cubic root of 121312442 is about 495.0340989332.

Adding to 121312442 its reverse (244213121), we get a palindrome (365525563).

The spelling of 121312442 in words is "one hundred twenty-one million, three hundred twelve thousand, four hundred forty-two".