200031220121 has 2 divisors, whose sum is σ = 200031220122. Its totient is φ = 200031220120.

The previous prime is 200031220063. The next prime is 200031220139. The reversal of 200031220121 is 121022130002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198015210121 + 2016010000 = 444989^2 + 44900^2 .

It is a cyclic number.

It is not a de Polignac number, because 200031220121 - 2¹⁸ = 200030957977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200031220096 and 200031220105.

It is not a weakly prime, because it can be changed into another prime (200031220321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100015610060 + 100015610061.

It is an arithmetic number, because the mean of its divisors is an integer number (100015610061).

Almost surely, 2^200031220121 is an apocalyptic number.

It is an amenable number.

200031220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

200031220121 is an equidigital number, since it uses as much as digits as its factorization.

200031220121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 200031220121 its reverse (121022130002), we get a palindrome (321053350123).

The spelling of 200031220121 in words is "two hundred billion, thirty-one million, two hundred twenty thousand, one hundred twenty-one".