21230000311023 has 24 divisors (see below), whose sum is σ = 35047326677376. Its totient is φ = 12131090571600.

The previous prime is 21230000311007. The next prime is 21230000311033. The reversal of 21230000311023 is 32011300003212.

It is not a de Polignac number, because 21230000311023 - 2⁴ = 21230000311007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21230000310987 and 21230000311005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230000311033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2410213 + ... + 6947598.

It is an arithmetic number, because the mean of its divisors is an integer number (1460305278224).

Almost surely, 2^{21230000311023} is an apocalyptic number.

21230000311023 is a deficient number, since it is larger than the sum of its proper divisors (13817326366353).

21230000311023 is a wasteful number, since it uses less digits than its factorization.

21230000311023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9393835 (or 9393832 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21230000311023 its reverse (32011300003212), we get a palindrome (53241300314235).

The spelling of 21230000311023 in words is "twenty-one trillion, two hundred thirty billion, three hundred eleven thousand, twenty-three".