111202110012221 has 2 divisors, whose sum is σ = 111202110012222. Its totient is φ = 111202110012220.

The previous prime is 111202110012143. The next prime is 111202110012233. The reversal of 111202110012221 is 122210011202111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110541041822500 + 661068189721 = 10513850^2 + 813061^2 .

It is a cyclic number.

It is not a de Polignac number, because 111202110012221 - 2¹⁰ = 111202110011197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111202110012221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111202110012281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55601055006110 + 55601055006111.

It is an arithmetic number, because the mean of its divisors is an integer number (55601055006111).

Almost surely, 2^{111202110012221} is an apocalyptic number.

It is an amenable number.

111202110012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111202110012221 is an equidigital number, since it uses as much as digits as its factorization.

111202110012221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111202110012221 its reverse (122210011202111), we get a palindrome (233412121214332).

The spelling of 111202110012221 in words is "one hundred eleven trillion, two hundred two billion, one hundred ten million, twelve thousand, two hundred twenty-one".