200020122121 has 16 divisors (see below), whose sum is σ = 205934579136. Its totient is φ = 194163955776.

The previous prime is 200020122101. The next prime is 200020122151. The reversal of 200020122121 is 121221020002.

It is a happy number.

It is not a de Polignac number, because 200020122121 - 2¹⁷ = 200019991049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200020122101) 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, 35131551 + ... + 35137243.

It is an arithmetic number, because the mean of its divisors is an integer number (12870911196).

Almost surely, 2^200020122121 is an apocalyptic number.

It is an amenable number.

200020122121 is a deficient number, since it is larger than the sum of its proper divisors (5914457015).

200020122121 is a wasteful number, since it uses less digits than its factorization.

200020122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10632.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 200020122121 its reverse (121221020002), we get a palindrome (321241142123).

The spelling of 200020122121 in words is "two hundred billion, twenty million, one hundred twenty-two thousand, one hundred twenty-one".