111210000221 has 2 divisors, whose sum is σ = 111210000222. Its totient is φ = 111210000220.

The previous prime is 111210000217. The next prime is 111210000229. The reversal of 111210000221 is 122000012111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83948688121 + 27261312100 = 289739^2 + 165110^2 .

It is a cyclic number.

It is not a de Polignac number, because 111210000221 - 2² = 111210000217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111210000229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605000110 + 55605000111.

It is an arithmetic number, because the mean of its divisors is an integer number (55605000111).

Almost surely, 2^111210000221 is an apocalyptic number.

It is an amenable number.

111210000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111210000221 is an equidigital number, since it uses as much as digits as its factorization.

111210000221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111210000221 its reverse (122000012111), we get a palindrome (233210012332).

The spelling of 111210000221 in words is "one hundred eleven billion, two hundred ten million, two hundred twenty-one", and thus it is an aban number.