2201201221081 has 2 divisors, whose sum is σ = 2201201221082. Its totient is φ = 2201201221080.

The previous prime is 2201201221067. The next prime is 2201201221127. The reversal of 2201201221081 is 1801221021022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1222716235225 + 978484985856 = 1105765^2 + 989184^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201201221081 - 2²³ = 2201192832473 is a prime.

It is a super-2 number, since 2×2201201221081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2201201225081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100600610540 + 1100600610541.

It is an arithmetic number, because the mean of its divisors is an integer number (1100600610541).

Almost surely, 2^{2201201221081} is an apocalyptic number.

It is an amenable number.

2201201221081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201201221081 is an equidigital number, since it uses as much as digits as its factorization.

2201201221081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 22.

The spelling of 2201201221081 in words is "two trillion, two hundred one billion, two hundred one million, two hundred twenty-one thousand, eighty-one".