111689101 has 2 divisors, whose sum is σ = 111689102. Its totient is φ = 111689100.

The previous prime is 111689093. The next prime is 111689107. The reversal of 111689101 is 101986111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110880900 + 808201 = 10530^2 + 899^2 .

It is a cyclic number.

It is not a de Polignac number, because 111689101 - 2³ = 111689093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111689101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111689107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55844550 + 55844551.

It is an arithmetic number, because the mean of its divisors is an integer number (55844551).

Almost surely, 2^111689101 is an apocalyptic number.

It is an amenable number.

111689101 is a deficient number, since it is larger than the sum of its proper divisors (1).

111689101 is an equidigital number, since it uses as much as digits as its factorization.

111689101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 28.

The square root of 111689101 is about 10568.3064395389. The cubic root of 111689101 is about 481.5820211539.

The spelling of 111689101 in words is "one hundred eleven million, six hundred eighty-nine thousand, one hundred one".