200042121 has 8 divisors (see below), whose sum is σ = 267592864. Its totient is φ = 132926400.

The previous prime is 200042113. The next prime is 200042147. The reversal of 200042121 is 121240002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 200042121 - 2³ = 200042113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200042097 and 200042106.

It is not an unprimeable number, because it can be changed into a prime (200040121) 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, 107680 + ... + 109521.

It is an arithmetic number, because the mean of its divisors is an integer number (33449108).

Almost surely, 2^200042121 is an apocalyptic number.

It is an amenable number.

200042121 is a deficient number, since it is larger than the sum of its proper divisors (67550743).

200042121 is a wasteful number, since it uses less digits than its factorization.

200042121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217511.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 200042121 is about 14143.6247475674. The cubic root of 200042121 is about 584.8445989446.

Adding to 200042121 its reverse (121240002), we get a palindrome (321282123).

The spelling of 200042121 in words is "two hundred million, forty-two thousand, one hundred twenty-one".