2120111993 has 2 divisors, whose sum is σ = 2120111994. Its totient is φ = 2120111992.

The previous prime is 2120111923. The next prime is 2120112023. The reversal of 2120111993 is 3991110212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1889467024 + 230644969 = 43468^2 + 15187^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120111993 - 2⁸ = 2120111737 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120111923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060055996 + 1060055997.

It is an arithmetic number, because the mean of its divisors is an integer number (1060055997).

Almost surely, 2^2120111993 is an apocalyptic number.

It is an amenable number.

2120111993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120111993 is an equidigital number, since it uses as much as digits as its factorization.

2120111993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 2120111993 is about 46044.6738830888. The cubic root of 2120111993 is about 1284.6542783445.

The spelling of 2120111993 in words is "two billion, one hundred twenty million, one hundred eleven thousand, nine hundred ninety-three".