2021110001923 has 2 divisors, whose sum is σ = 2021110001924. Its totient is φ = 2021110001922.

The previous prime is 2021110001921. The next prime is 2021110002007. The reversal of 2021110001923 is 3291000111202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021110001923 - 2¹ = 2021110001921 is a prime.

Together with 2021110001921, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2021110001894 and 2021110001903.

It is not a weakly prime, because it can be changed into another prime (2021110001921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010555000961 + 1010555000962.

It is an arithmetic number, because the mean of its divisors is an integer number (1010555000962).

Almost surely, 2^{2021110001923} is an apocalyptic number.

2021110001923 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021110001923 is an equidigital number, since it uses as much as digits as its factorization.

2021110001923 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 2021110001923 in words is "two trillion, twenty-one billion, one hundred ten million, one thousand, nine hundred twenty-three".