21133311212023 has 4 divisors (see below), whose sum is σ = 21134167633800. Its totient is φ = 21132454790248.

The previous prime is 21133311212003. The next prime is 21133311212051. The reversal of 21133311212023 is 32021211333112.

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 21133311212023 - 2⁹ = 21133311211511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133311212003) 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, 428173873 + ... + 428223226.

It is an arithmetic number, because the mean of its divisors is an integer number (5283541908450).

Almost surely, 2^{21133311212023} is an apocalyptic number.

21133311212023 is a deficient number, since it is larger than the sum of its proper divisors (856421777).

21133311212023 is an equidigital number, since it uses as much as digits as its factorization.

21133311212023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856421776.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21133311212023 its reverse (32021211333112), we get a palindrome (53154522545135).

The spelling of 21133311212023 in words is "twenty-one trillion, one hundred thirty-three billion, three hundred eleven million, two hundred twelve thousand, twenty-three".