2111023021 has 2 divisors, whose sum is σ = 2111023022. Its totient is φ = 2111023020.

The previous prime is 2111022887. The next prime is 2111023039. The reversal of 2111023021 is 1203201112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2100388900 + 10634121 = 45830^2 + 3261^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111023021 - 2²⁷ = 1976805293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2111022992 and 2111023010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111023121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055511510 + 1055511511.

It is an arithmetic number, because the mean of its divisors is an integer number (1055511511).

Almost surely, 2^2111023021 is an apocalyptic number.

It is an amenable number.

2111023021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111023021 is an equidigital number, since it uses as much as digits as its factorization.

2111023021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2111023021 is about 45945.8705543817. The cubic root of 2111023021 is about 1282.8158672884.

Adding to 2111023021 its reverse (1203201112), we get a palindrome (3314224133).

The spelling of 2111023021 in words is "two billion, one hundred eleven million, twenty-three thousand, twenty-one".