116221109 has 2 divisors, whose sum is σ = 116221110. Its totient is φ = 116221108.

The previous prime is 116221069. The next prime is 116221117. The reversal of 116221109 is 901122611.

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., 110355025 + 5866084 = 10505^2 + 2422^2 .

It is a cyclic number.

It is not a de Polignac number, because 116221109 - 2¹⁶ = 116155573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116221709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58110554 + 58110555.

It is an arithmetic number, because the mean of its divisors is an integer number (58110555).

Almost surely, 2^116221109 is an apocalyptic number.

It is an amenable number.

116221109 is a deficient number, since it is larger than the sum of its proper divisors (1).

116221109 is an equidigital number, since it uses as much as digits as its factorization.

116221109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 116221109 is about 10780.5894551272. The cubic root of 116221109 is about 488.0095696524.

The spelling of 116221109 in words is "one hundred sixteen million, two hundred twenty-one thousand, one hundred nine".