221121002112091 has 2 divisors, whose sum is σ = 221121002112092. Its totient is φ = 221121002112090.

The previous prime is 221121002112071. The next prime is 221121002112193. The reversal of 221121002112091 is 190211200121122.

221121002112091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221121002112091 - 2¹⁵ = 221121002079323 is a prime.

It is not a weakly prime, because it can be changed into another prime (221121002112011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560501056045 + 110560501056046.

It is an arithmetic number, because the mean of its divisors is an integer number (110560501056046).

Almost surely, 2^{221121002112091} is an apocalyptic number.

221121002112091 is a deficient number, since it is larger than the sum of its proper divisors (1).

221121002112091 is an equidigital number, since it uses as much as digits as its factorization.

221121002112091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 221121002112091 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, two million, one hundred twelve thousand, ninety-one".