111232009391 has 2 divisors, whose sum is σ = 111232009392. Its totient is φ = 111232009390.

The previous prime is 111232009387. The next prime is 111232009463. The reversal of 111232009391 is 193900232111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111232009391 - 2² = 111232009387 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111232009381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55616004695 + 55616004696.

It is an arithmetic number, because the mean of its divisors is an integer number (55616004696).

Almost surely, 2^111232009391 is an apocalyptic number.

111232009391 is a deficient number, since it is larger than the sum of its proper divisors (1).

111232009391 is an equidigital number, since it uses as much as digits as its factorization.

111232009391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 32.

The spelling of 111232009391 in words is "one hundred eleven billion, two hundred thirty-two million, nine thousand, three hundred ninety-one".