220200100121 has 2 divisors, whose sum is σ = 220200100122. Its totient is φ = 220200100120.

The previous prime is 220200100117. The next prime is 220200100151. The reversal of 220200100121 is 121001002022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114582250000 + 105617850121 = 338500^2 + 324989^2 .

It is a cyclic number.

It is not a de Polignac number, because 220200100121 - 2² = 220200100117 is a prime.

It is not a weakly prime, because it can be changed into another prime (220200100151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110100050060 + 110100050061.

It is an arithmetic number, because the mean of its divisors is an integer number (110100050061).

Almost surely, 2^220200100121 is an apocalyptic number.

It is an amenable number.

220200100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

220200100121 is an equidigital number, since it uses as much as digits as its factorization.

220200100121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220200100121 its reverse (121001002022), we get a palindrome (341201102143).

The spelling of 220200100121 in words is "two hundred twenty billion, two hundred million, one hundred thousand, one hundred twenty-one".