111110209997 has 2 divisors, whose sum is σ = 111110209998. Its totient is φ = 111110209996.

The previous prime is 111110209963. The next prime is 111110210017. The reversal of 111110209997 is 799902011111.

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., 94039742281 + 17070467716 = 306659^2 + 130654^2 .

It is a cyclic number.

It is not a de Polignac number, because 111110209997 - 2¹⁶ = 111110144461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111110209927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555104998 + 55555104999.

It is an arithmetic number, because the mean of its divisors is an integer number (55555104999).

Almost surely, 2^111110209997 is an apocalyptic number.

It is an amenable number.

111110209997 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110209997 is an equidigital number, since it uses as much as digits as its factorization.

111110209997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 41.

The spelling of 111110209997 in words is "one hundred eleven billion, one hundred ten million, two hundred nine thousand, nine hundred ninety-seven".