111020202109 has 2 divisors, whose sum is σ = 111020202110. Its totient is φ = 111020202108.

The previous prime is 111020202103. The next prime is 111020202131. The reversal of 111020202109 is 901202020111.

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., 110720566009 + 299636100 = 332747^2 + 17310^2 .

It is a cyclic number.

It is not a de Polignac number, because 111020202109 - 2⁹ = 111020201597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111020202103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510101054 + 55510101055.

It is an arithmetic number, because the mean of its divisors is an integer number (55510101055).

Almost surely, 2^111020202109 is an apocalyptic number.

It is an amenable number.

111020202109 is a deficient number, since it is larger than the sum of its proper divisors (1).

111020202109 is an equidigital number, since it uses as much as digits as its factorization.

111020202109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 111020202109 in words is "one hundred eleven billion, twenty million, two hundred two thousand, one hundred nine".