2120111923 has 2 divisors, whose sum is σ = 2120111924. Its totient is φ = 2120111922.

The previous prime is 2120111921. The next prime is 2120111993. The reversal of 2120111923 is 3291110212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120111923 - 2¹ = 2120111921 is a prime.

Together with 2120111921, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2120111894 and 2120111903.

It is not a weakly prime, because it can be changed into another prime (2120111921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060055961 + 1060055962.

It is an arithmetic number, because the mean of its divisors is an integer number (1060055962).

Almost surely, 2^2120111923 is an apocalyptic number.

2120111923 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120111923 is an equidigital number, since it uses as much as digits as its factorization.

2120111923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 2120111923 is about 46044.6731229574. The cubic root of 2120111923 is about 1284.6542642060.

It can be divided in two parts, 21201 and 11923, that added together give a square (33124 = 182²).

The spelling of 2120111923 in words is "two billion, one hundred twenty million, one hundred eleven thousand, nine hundred twenty-three".