20112333109991 has 2 divisors, whose sum is σ = 20112333109992. Its totient is φ = 20112333109990.

The previous prime is 20112333109931. The next prime is 20112333110021. The reversal of 20112333109991 is 19990133321102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20112333109991 - 2¹⁸ = 20112332847847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20112333109931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056166554995 + 10056166554996.

It is an arithmetic number, because the mean of its divisors is an integer number (10056166554996).

Almost surely, 2^{20112333109991} is an apocalyptic number.

20112333109991 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112333109991 is an equidigital number, since it uses as much as digits as its factorization.

20112333109991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 44.

The spelling of 20112333109991 in words is "twenty trillion, one hundred twelve billion, three hundred thirty-three million, one hundred nine thousand, nine hundred ninety-one".