21200111022023 has 4 divisors (see below), whose sum is σ = 21200120267088. Its totient is φ = 21200101776960.

The previous prime is 21200111022019. The next prime is 21200111022037. The reversal of 21200111022023 is 32022011100212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21200111022023 - 2² = 21200111022019 is a prime.

It is a super-2 number, since 2×21200111022023² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21200111021992 and 21200111022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200111022043) 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, 1697015 + ... + 6729047.

It is an arithmetic number, because the mean of its divisors is an integer number (5300030066772).

Almost surely, 2^{21200111022023} is an apocalyptic number.

21200111022023 is a deficient number, since it is larger than the sum of its proper divisors (9245065).

21200111022023 is an equidigital number, since it uses as much as digits as its factorization.

21200111022023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9245064.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21200111022023 its reverse (32022011100212), we get a palindrome (53222122122235).

The spelling of 21200111022023 in words is "twenty-one trillion, two hundred billion, one hundred eleven million, twenty-two thousand, twenty-three".