121331042 has 16 divisors (see below), whose sum is σ = 208593792. Its totient is φ = 51849600.

The previous prime is 121331039. The next prime is 121331047. The reversal of 121331042 is 240133121.

It is a self number, because there is not a number n which added to its sum of digits gives 121331042.

It is not an unprimeable number, because it can be changed into a prime (121331047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7334 + ... + 17217.

It is an arithmetic number, because the mean of its divisors is an integer number (13037112).

Almost surely, 2^121331042 is an apocalyptic number.

121331042 is a deficient number, since it is larger than the sum of its proper divisors (87262750).

121331042 is a wasteful number, since it uses less digits than its factorization.

121331042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24913.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 121331042 is about 11015.0370857297. The cubic root of 121331042 is about 495.0593976949.

Adding to 121331042 its reverse (240133121), we get a palindrome (361464163).

The spelling of 121331042 in words is "one hundred twenty-one million, three hundred thirty-one thousand, forty-two".