21111110230023 has 24 divisors (see below), whose sum is σ = 34039619602560. Its totient is φ = 12497063135760.

The previous prime is 21111110230019. The next prime is 21111110230057. The reversal of 21111110230023 is 32003201111112.

It is not a de Polignac number, because 21111110230023 - 2² = 21111110230019 is a prime.

It is a super-3 number, since 3×21111110230023³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21111110229978 and 21111110230005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111110230073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2479571763 + ... + 2479580276.

It is an arithmetic number, because the mean of its divisors is an integer number (1418317483440).

Almost surely, 2^{21111110230023} is an apocalyptic number.

21111110230023 is a deficient number, since it is larger than the sum of its proper divisors (12928509372537).

21111110230023 is a wasteful number, since it uses less digits than its factorization.

21111110230023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4959152099 (or 4959152096 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21111110230023 its reverse (32003201111112), we get a palindrome (53114311341135).

The spelling of 21111110230023 in words is "twenty-one trillion, one hundred eleven billion, one hundred ten million, two hundred thirty thousand, twenty-three".