111011102009 has 2 divisors, whose sum is σ = 111011102010. Its totient is φ = 111011102008.

The previous prime is 111011101951. The next prime is 111011102071. The reversal of 111011102009 is 900201110111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87481075984 + 23530026025 = 295772^2 + 153395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111011102009 is a prime.

It is not a weakly prime, because it can be changed into another prime (111011102099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505551004 + 55505551005.

It is an arithmetic number, because the mean of its divisors is an integer number (55505551005).

Almost surely, 2^111011102009 is an apocalyptic number.

It is an amenable number.

111011102009 is a deficient number, since it is larger than the sum of its proper divisors (1).

111011102009 is an equidigital number, since it uses as much as digits as its factorization.

111011102009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 17.

The spelling of 111011102009 in words is "one hundred eleven billion, eleven million, one hundred two thousand, nine".