111221210099 has 2 divisors, whose sum is σ = 111221210100. Its totient is φ = 111221210098.

The previous prime is 111221210059. The next prime is 111221210117. The reversal of 111221210099 is 990012122111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111221210099 - 2⁸ = 111221209843 is a prime.

It is not a weakly prime, because it can be changed into another prime (111221210059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610605049 + 55610605050.

It is an arithmetic number, because the mean of its divisors is an integer number (55610605050).

Almost surely, 2^111221210099 is an apocalyptic number.

111221210099 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221210099 is an equidigital number, since it uses as much as digits as its factorization.

111221210099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 29.

It can be divided in two parts, 11122 and 1210099, that added together give a palindrome (1221221).

The spelling of 111221210099 in words is "one hundred eleven billion, two hundred twenty-one million, two hundred ten thousand, ninety-nine".