111323101010221 has 2 divisors, whose sum is σ = 111323101010222. Its totient is φ = 111323101010220.

The previous prime is 111323101010197. The next prime is 111323101010273. The reversal of 111323101010221 is 122010101323111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91390349628900 + 19932751381321 = 9559830^2 + 4464611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111323101010221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111323101010021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55661550505110 + 55661550505111.

It is an arithmetic number, because the mean of its divisors is an integer number (55661550505111).

Almost surely, 2^{111323101010221} is an apocalyptic number.

It is an amenable number.

111323101010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111323101010221 is an equidigital number, since it uses as much as digits as its factorization.

111323101010221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 111323101010221 its reverse (122010101323111), we get a palindrome (233333202333332).

The spelling of 111323101010221 in words is "one hundred eleven trillion, three hundred twenty-three billion, one hundred one million, ten thousand, two hundred twenty-one".