2201000099981 has 2 divisors, whose sum is σ = 2201000099982. Its totient is φ = 2201000099980.

The previous prime is 2201000099957. The next prime is 2201000100043. The reversal of 2201000099981 is 1899900001022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1524321113956 + 676678986025 = 1234634^2 + 822605^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201000099981 - 2⁶ = 2201000099917 is a prime.

It is a super-2 number, since 2×2201000099981² (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 (2201000099381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100500049990 + 1100500049991.

It is an arithmetic number, because the mean of its divisors is an integer number (1100500049991).

Almost surely, 2^{2201000099981} is an apocalyptic number.

It is an amenable number.

2201000099981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201000099981 is an equidigital number, since it uses as much as digits as its factorization.

2201000099981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 2201000099981 in words is "two trillion, two hundred one billion, ninety-nine thousand, nine hundred eighty-one".