200122212121 has 4 divisors (see below), whose sum is σ = 215516228452. Its totient is φ = 184728195792.

The previous prime is 200122212107. The next prime is 200122212151. The reversal of 200122212121 is 121212221002.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17078569225 + 183043642896 = 130685^2 + 427836^2 .

It is a cyclic number.

It is not a de Polignac number, because 200122212121 - 2¹¹ = 200122210073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200122212095 and 200122212104.

It is not an unprimeable number, because it can be changed into a prime (200122212151) 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, 7697008146 + ... + 7697008171.

It is an arithmetic number, because the mean of its divisors is an integer number (53879057113).

Almost surely, 2^200122212121 is an apocalyptic number.

It is an amenable number.

200122212121 is a deficient number, since it is larger than the sum of its proper divisors (15394016331).

200122212121 is a wasteful number, since it uses less digits than its factorization.

200122212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15394016330.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 200122212121 its reverse (121212221002), we get a palindrome (321334433123).

The spelling of 200122212121 in words is "two hundred billion, one hundred twenty-two million, two hundred twelve thousand, one hundred twenty-one".