121384042 has 16 divisors (see below), whose sum is σ = 197404200. Its totient is φ = 55645632.

The previous prime is 121384019. The next prime is 121384049. The reversal of 121384042 is 240483121.

It can be written as a sum of positive squares in 4 ways, for example, as 100781521 + 20602521 = 10039^2 + 4539^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121383998 and 121384016.

It is not an unprimeable number, because it can be changed into a prime (121384049) 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, 11793 + ... + 19540.

Almost surely, 2^121384042 is an apocalyptic number.

121384042 is a deficient number, since it is larger than the sum of its proper divisors (76020158).

121384042 is a wasteful number, since it uses less digits than its factorization.

121384042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31497.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 121384042 is about 11017.4426252193. The cubic root of 121384042 is about 495.1314713872.

The spelling of 121384042 in words is "one hundred twenty-one million, three hundred eighty-four thousand, forty-two".