21120000000023 has 2 divisors, whose sum is σ = 21120000000024. Its totient is φ = 21120000000022.

The previous prime is 21119999999993. The next prime is 21120000000083. The reversal of 21120000000023 is 32000000002112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21120000000023 is a prime.

It is a super-3 number, since 3×21120000000023³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21119999999941 and 21120000000013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120000000083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560000000011 + 10560000000012.

It is an arithmetic number, because the mean of its divisors is an integer number (10560000000012).

Almost surely, 2^{21120000000023} is an apocalyptic number.

21120000000023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120000000023 is an equidigital number, since it uses as much as digits as its factorization.

21120000000023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21120000000023 its reverse (32000000002112), we get a palindrome (53120000002135).

The spelling of 21120000000023 in words is "twenty-one trillion, one hundred twenty billion, twenty-three", and thus it is an aban number.