21133234140023 has 4 divisors (see below), whose sum is σ = 21133243670040. Its totient is φ = 21133224610008.

The previous prime is 21133234140019. The next prime is 21133234140047. The reversal of 21133234140023 is 32004143233112.

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 21133234140023 - 2² = 21133234140019 is a prime.

It is a super-2 number, since 2×21133234140023² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133234140923) 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, 501773 + ... + 6520601.

It is an arithmetic number, because the mean of its divisors is an integer number (5283310917510).

Almost surely, 2^{21133234140023} is an apocalyptic number.

21133234140023 is a deficient number, since it is larger than the sum of its proper divisors (9530017).

21133234140023 is an equidigital number, since it uses as much as digits as its factorization.

21133234140023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9530016.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 21133234140023 its reverse (32004143233112), we get a palindrome (53137377373135).

The spelling of 21133234140023 in words is "twenty-one trillion, one hundred thirty-three billion, two hundred thirty-four million, one hundred forty thousand, twenty-three".