111222961 has 2 divisors, whose sum is σ = 111222962. Its totient is φ = 111222960.

The previous prime is 111222949. The next prime is 111222967. The reversal of 111222961 is 169222111.

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., 90611361 + 20611600 = 9519^2 + 4540^2 .

It is an emirp because it is prime and its reverse (169222111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111222961 - 2⁷ = 111222833 is a prime.

It is not a weakly prime, because it can be changed into another prime (111222967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611480 + 55611481.

It is an arithmetic number, because the mean of its divisors is an integer number (55611481).

Almost surely, 2^111222961 is an apocalyptic number.

It is an amenable number.

111222961 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222961 is an equidigital number, since it uses as much as digits as its factorization.

111222961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 25.

The square root of 111222961 is about 10546.2297054445. The cubic root of 111222961 is about 480.9111181242.

The spelling of 111222961 in words is "one hundred eleven million, two hundred twenty-two thousand, nine hundred sixty-one".