111112221109 has 2 divisors, whose sum is σ = 111112221110. Its totient is φ = 111112221108.

The previous prime is 111112221067. The next prime is 111112221127. The reversal of 111112221109 is 901122211111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87550892100 + 23561329009 = 295890^2 + 153497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111112221109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111112221109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111112225109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55556110554 + 55556110555.

It is an arithmetic number, because the mean of its divisors is an integer number (55556110555).

Almost surely, 2^111112221109 is an apocalyptic number.

It is an amenable number.

111112221109 is a deficient number, since it is larger than the sum of its proper divisors (1).

111112221109 is an equidigital number, since it uses as much as digits as its factorization.

111112221109 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 22.

The spelling of 111112221109 in words is "one hundred eleven billion, one hundred twelve million, two hundred twenty-one thousand, one hundred nine".