112021391 has 2 divisors, whose sum is σ = 112021392. Its totient is φ = 112021390.

The previous prime is 112021369. The next prime is 112021411. The reversal of 112021391 is 193120211.

It is an a-pointer prime, because the next prime (112021411) can be obtained adding 112021391 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 112021391 - 2¹⁰ = 112020367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112011391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56010695 + 56010696.

It is an arithmetic number, because the mean of its divisors is an integer number (56010696).

Almost surely, 2^112021391 is an apocalyptic number.

112021391 is a deficient number, since it is larger than the sum of its proper divisors (1).

112021391 is an equidigital number, since it uses as much as digits as its factorization.

112021391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 112021391 is about 10584.0158257629. The cubic root of 112021391 is about 482.0591385918.

The spelling of 112021391 in words is "one hundred twelve million, twenty-one thousand, three hundred ninety-one".