200142342121 has 4 divisors (see below), whose sum is σ = 200143652752. Its totient is φ = 200141031492.

The previous prime is 200142342107. The next prime is 200142342137. The reversal of 200142342121 is 121243241002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200142342121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200142342092 and 200142342101.

It is not an unprimeable number, because it can be changed into a prime (200142346121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390615 + ... + 743548.

It is an arithmetic number, because the mean of its divisors is an integer number (50035913188).

Almost surely, 2^200142342121 is an apocalyptic number.

It is an amenable number.

200142342121 is a deficient number, since it is larger than the sum of its proper divisors (1310631).

200142342121 is a wasteful number, since it uses less digits than its factorization.

200142342121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310630.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 200142342121 its reverse (121243241002), we get a palindrome (321385583123).

The spelling of 200142342121 in words is "two hundred billion, one hundred forty-two million, three hundred forty-two thousand, one hundred twenty-one".