2201128904981 has 2 divisors, whose sum is σ = 2201128904982. Its totient is φ = 2201128904980.

The previous prime is 2201128904959. The next prime is 2201128904993. The reversal of 2201128904981 is 1894098211022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2077175620081 + 123953284900 = 1441241^2 + 352070^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201128904981 - 2⁶ = 2201128904917 is a prime.

It is a super-2 number, since 2×2201128904981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2201128904921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100564452490 + 1100564452491.

It is an arithmetic number, because the mean of its divisors is an integer number (1100564452491).

Almost surely, 2^{2201128904981} is an apocalyptic number.

It is an amenable number.

2201128904981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201128904981 is an equidigital number, since it uses as much as digits as its factorization.

2201128904981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 47.

The spelling of 2201128904981 in words is "two trillion, two hundred one billion, one hundred twenty-eight million, nine hundred four thousand, nine hundred eighty-one".