200022121 has 4 divisors (see below), whose sum is σ = 215408452. Its totient is φ = 184635792.

The previous prime is 200022113. The next prime is 200022143. The reversal of 200022121 is 121220002.

200022121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121220002 = 2 ⋅60610001.

It can be written as a sum of positive squares in 2 ways, for example, as 16040025 + 183982096 = 4005^2 + 13564^2 .

It is a cyclic number.

It is not a de Polignac number, because 200022121 - 2³ = 200022113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200022098 and 200022107.

It is not an unprimeable number, because it can be changed into a prime (200022161) 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, 7693146 + ... + 7693171.

It is an arithmetic number, because the mean of its divisors is an integer number (53852113).

Almost surely, 2^200022121 is an apocalyptic number.

It is an amenable number.

200022121 is a deficient number, since it is larger than the sum of its proper divisors (15386331).

200022121 is a wasteful number, since it uses less digits than its factorization.

200022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15386330.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 200022121 is about 14142.9176975616. The cubic root of 200022121 is about 584.8251075798.

Adding to 200022121 its reverse (121220002), we get a palindrome (321242123).

The spelling of 200022121 in words is "two hundred million, twenty-two thousand, one hundred twenty-one".