2221091571233 has 2 divisors, whose sum is σ = 2221091571234. Its totient is φ = 2221091571232.

The previous prime is 2221091571229. The next prime is 2221091571241. The reversal of 2221091571233 is 3321751901222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2199191123089 + 21900448144 = 1482967^2 + 147988^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221091571233 - 2² = 2221091571229 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221091571133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110545785616 + 1110545785617.

It is an arithmetic number, because the mean of its divisors is an integer number (1110545785617).

Almost surely, 2^{2221091571233} is an apocalyptic number.

It is an amenable number.

2221091571233 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221091571233 is an equidigital number, since it uses as much as digits as its factorization.

2221091571233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 2221091571233 in words is "two trillion, two hundred twenty-one billion, ninety-one million, five hundred seventy-one thousand, two hundred thirty-three".