2021100023 has 2 divisors, whose sum is σ = 2021100024. Its totient is φ = 2021100022.

The previous prime is 2021100019. The next prime is 2021100041. The reversal of 2021100023 is 3200011202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021100023 - 2² = 2021100019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021099977 and 2021100013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021100073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010550011 + 1010550012.

It is an arithmetic number, because the mean of its divisors is an integer number (1010550012).

Almost surely, 2^2021100023 is an apocalyptic number.

2021100023 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021100023 is an equidigital number, since it uses as much as digits as its factorization.

2021100023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2021100023 is about 44956.6460381555. The cubic root of 2021100023 is about 1264.3362863628.

Adding to 2021100023 its reverse (3200011202), we get a palindrome (5221111225).

The spelling of 2021100023 in words is "two billion, twenty-one million, one hundred thousand, twenty-three".