121404042 has 16 divisors (see below), whose sum is σ = 269786880. Its totient is φ = 40467996.

The previous prime is 121404013. The next prime is 121404043. The reversal of 121404042 is 240404121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121404043) 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, 1124058 + ... + 1124165.

It is an arithmetic number, because the mean of its divisors is an integer number (16861680).

Almost surely, 2^121404042 is an apocalyptic number.

121404042 is an abundant number, since it is smaller than the sum of its proper divisors (148382838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121404042 is a wasteful number, since it uses less digits than its factorization.

121404042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248234 (or 2248228 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 121404042 is about 11018.3502394869. The cubic root of 121404042 is about 495.1586635546.

Adding to 121404042 its reverse (240404121), we get a palindrome (361808163).

The spelling of 121404042 in words is "one hundred twenty-one million, four hundred four thousand, forty-two".