2221131233171 has 2 divisors, whose sum is σ = 2221131233172. Its totient is φ = 2221131233170.

The previous prime is 2221131233149. The next prime is 2221131233221. The reversal of 2221131233171 is 1713321311222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221131233171 - 2⁶ = 2221131233107 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221131233471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110565616585 + 1110565616586.

It is an arithmetic number, because the mean of its divisors is an integer number (1110565616586).

Almost surely, 2^{2221131233171} is an apocalyptic number.

2221131233171 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221131233171 is an equidigital number, since it uses as much as digits as its factorization.

2221131233171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 29.

Adding to 2221131233171 its reverse (1713321311222), we get a palindrome (3934452544393).

The spelling of 2221131233171 in words is "two trillion, two hundred twenty-one billion, one hundred thirty-one million, two hundred thirty-three thousand, one hundred seventy-one".