200122020121 has 8 divisors (see below), whose sum is σ = 205519442184. Its totient is φ = 194749188480.

The previous prime is 200122020113. The next prime is 200122020143. The reversal of 200122020121 is 121020221002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20295136521 + 179826883600 = 142461^2 + 424060^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 200122020121 - 2³ = 200122020113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200122020151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6131110 + ... + 6163663.

It is an arithmetic number, because the mean of its divisors is an integer number (25689930273).

Almost surely, 2^200122020121 is an apocalyptic number.

It is an amenable number.

200122020121 is a deficient number, since it is larger than the sum of its proper divisors (5397422063).

200122020121 is a wasteful number, since it uses less digits than its factorization.

200122020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12295211.

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

Adding to 200122020121 its reverse (121020221002), we get a palindrome (321142241123).

The spelling of 200122020121 in words is "two hundred billion, one hundred twenty-two million, twenty thousand, one hundred twenty-one".