221323111349 has 2 divisors, whose sum is σ = 221323111350. Its totient is φ = 221323111348.

The previous prime is 221323111301. The next prime is 221323111357. The reversal of 221323111349 is 943111323122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121455735025 + 99867376324 = 348505^2 + 316018^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221323111349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221323111649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110661555674 + 110661555675.

It is an arithmetic number, because the mean of its divisors is an integer number (110661555675).

Almost surely, 2^221323111349 is an apocalyptic number.

It is an amenable number.

221323111349 is a deficient number, since it is larger than the sum of its proper divisors (1).

221323111349 is an equidigital number, since it uses as much as digits as its factorization.

221323111349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The spelling of 221323111349 in words is "two hundred twenty-one billion, three hundred twenty-three million, one hundred eleven thousand, three hundred forty-nine".