200120042 has 4 divisors (see below), whose sum is σ = 300180066. Its totient is φ = 100060020.

The previous prime is 200120029. The next prime is 200120069. The reversal of 200120042 is 240021002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 199628641 + 491401 = 14129^2 + 701^2 .

It is a super-3 number, since 3×200120042³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50030009 + ... + 50030012.

Almost surely, 2^200120042 is an apocalyptic number.

200120042 is a deficient number, since it is larger than the sum of its proper divisors (100060024).

200120042 is a wasteful number, since it uses less digits than its factorization.

200120042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100060023.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 200120042 is about 14146.3791126917. The cubic root of 200120042 is about 584.9205258876.

Adding to 200120042 its reverse (240021002), we get a palindrome (440141044).

The spelling of 200120042 in words is "two hundred million, one hundred twenty thousand, forty-two".