21111121233123 has 8 divisors (see below), whose sum is σ = 28157510099136. Its totient is φ = 14069406594600.

The previous prime is 21111121232987. The next prime is 21111121233133. The reversal of 21111121233123 is 32133212111112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21111121233123 - 2¹⁰ = 21111121232099 is a prime.

It is a super-2 number, since 2×21111121233123² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21111121233093 and 21111121233102.

It is not an unprimeable number, because it can be changed into a prime (21111121233133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1168546333 + ... + 1168564398.

It is an arithmetic number, because the mean of its divisors is an integer number (3519688762392).

Almost surely, 2^{21111121233123} is an apocalyptic number.

21111121233123 is a deficient number, since it is larger than the sum of its proper divisors (7046388866013).

21111121233123 is a wasteful number, since it uses less digits than its factorization.

21111121233123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337113745.

The product of its digits is 432, while the sum is 24.

Adding to 21111121233123 its reverse (32133212111112), we get a palindrome (53244333344235).

The spelling of 21111121233123 in words is "twenty-one trillion, one hundred eleven billion, one hundred twenty-one million, two hundred thirty-three thousand, one hundred twenty-three".