21133312023 has 16 divisors (see below), whose sum is σ = 28615648896. Its totient is φ = 13871541600.

The previous prime is 21133312021. The next prime is 21133312049. The reversal of 21133312023 is 32021333112.

It is not a de Polignac number, because 21133312023 - 2¹ = 21133312021 is a prime.

It is a super-3 number, since 3×21133312023³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133312021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149628 + ... + 254273.

It is an arithmetic number, because the mean of its divisors is an integer number (1788478056).

Almost surely, 2^21133312023 is an apocalyptic number.

21133312023 is a deficient number, since it is larger than the sum of its proper divisors (7482336873).

21133312023 is a wasteful number, since it uses less digits than its factorization.

21133312023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404174.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21133312023 its reverse (32021333112), we get a palindrome (53154645135).

The spelling of 21133312023 in words is "twenty-one billion, one hundred thirty-three million, three hundred twelve thousand, twenty-three".