21011130333123 has 12 divisors (see below), whose sum is σ = 32588691945480. Its totient is φ = 12006360190272.

The previous prime is 21011130333121. The next prime is 21011130333209. The reversal of 21011130333123 is 32133303111012.

It is not a de Polignac number, because 21011130333123 - 2¹ = 21011130333121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21011130333093 and 21011130333102.

It is not an unprimeable number, because it can be changed into a prime (21011130333121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71466429558 + ... + 71466429851.

It is an arithmetic number, because the mean of its divisors is an integer number (2715724328790).

Almost surely, 2^{21011130333123} is an apocalyptic number.

21011130333123 is a deficient number, since it is larger than the sum of its proper divisors (11577561612357).

21011130333123 is a wasteful number, since it uses less digits than its factorization.

21011130333123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142932859426 (or 142932859419 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 21011130333123 its reverse (32133303111012), we get a palindrome (53144433444135).

The spelling of 21011130333123 in words is "twenty-one trillion, eleven billion, one hundred thirty million, three hundred thirty-three thousand, one hundred twenty-three".