2201121491 has 2 divisors, whose sum is σ = 2201121492. Its totient is φ = 2201121490.

The previous prime is 2201121467. The next prime is 2201121497. The reversal of 2201121491 is 1941211022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2201121491 - 2¹⁸ = 2200859347 is a prime.

It is not a weakly prime, because it can be changed into another prime (2201121497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100560745 + 1100560746.

It is an arithmetic number, because the mean of its divisors is an integer number (1100560746).

Almost surely, 2^2201121491 is an apocalyptic number.

2201121491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201121491 is an equidigital number, since it uses as much as digits as its factorization.

2201121491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 2201121491 is about 46916.1112092637. Note that the first 3 decimals coincide. The cubic root of 2201121491 is about 1300.8124095518.

The spelling of 2201121491 in words is "two billion, two hundred one million, one hundred twenty-one thousand, four hundred ninety-one".