200122421 has 16 divisors (see below), whose sum is σ = 214228800. Its totient is φ = 186403968.

The previous prime is 200122399. The next prime is 200122427. The reversal of 200122421 is 124221002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200122421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200122396 and 200122405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200122427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351425 + ... + 351993.

It is an arithmetic number, because the mean of its divisors is an integer number (13389300).

Almost surely, 2^200122421 is an apocalyptic number.

It is an amenable number.

200122421 is a deficient number, since it is larger than the sum of its proper divisors (14106379).

200122421 is a wasteful number, since it uses less digits than its factorization.

200122421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 200122421 is about 14146.4631975628. The cubic root of 200122421 is about 584.9228436972.

Adding to 200122421 its reverse (124221002), we get a palindrome (324343423).

The spelling of 200122421 in words is "two hundred million, one hundred twenty-two thousand, four hundred twenty-one".