2021011100023 has 4 divisors (see below), whose sum is σ = 2021020796160. Its totient is φ = 2021001403888.

The previous prime is 2021011099993. The next prime is 2021011100029. The reversal of 2021011100023 is 3200011101202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2021011100023 - 2³⁷ = 1883572146551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021011099976 and 2021011100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021011100029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4528390 + ... + 4954627.

It is an arithmetic number, because the mean of its divisors is an integer number (505255199040).

Almost surely, 2^{2021011100023} is an apocalyptic number.

2021011100023 is a deficient number, since it is larger than the sum of its proper divisors (9696137).

2021011100023 is an equidigital number, since it uses as much as digits as its factorization.

2021011100023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9696136.

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

Adding to 2021011100023 its reverse (3200011101202), we get a palindrome (5221022201225).

The spelling of 2021011100023 in words is "two trillion, twenty-one billion, eleven million, one hundred thousand, twenty-three".