201100101125221 has 2 divisors, whose sum is σ = 201100101125222. Its totient is φ = 201100101125220.

The previous prime is 201100101125179. The next prime is 201100101125239. The reversal of 201100101125221 is 122521101001102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199995739740225 + 1104361384996 = 14141985^2 + 1050886^2 .

It is a cyclic number.

It is not a de Polignac number, because 201100101125221 - 2⁷ = 201100101125093 is a prime.

It is a super-2 number, since 2×201100101125221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201100101125821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100550050562610 + 100550050562611.

It is an arithmetic number, because the mean of its divisors is an integer number (100550050562611).

Almost surely, 2^{201100101125221} is an apocalyptic number.

It is an amenable number.

201100101125221 is a deficient number, since it is larger than the sum of its proper divisors (1).

201100101125221 is an equidigital number, since it uses as much as digits as its factorization.

201100101125221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 201100101125221 its reverse (122521101001102), we get a palindrome (323621202126323).

The spelling of 201100101125221 in words is "two hundred one trillion, one hundred billion, one hundred one million, one hundred twenty-five thousand, two hundred twenty-one".