21233120011123 has 2 divisors, whose sum is σ = 21233120011124. Its totient is φ = 21233120011122.

The previous prime is 21233120011049. The next prime is 21233120011153. The reversal of 21233120011123 is 32111002133212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21233120011123 is a prime.

It is a super-2 number, since 2×21233120011123² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21233120011094 and 21233120011103.

It is not a weakly prime, because it can be changed into another prime (21233120011153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616560005561 + 10616560005562.

It is an arithmetic number, because the mean of its divisors is an integer number (10616560005562).

Almost surely, 2^{21233120011123} is an apocalyptic number.

21233120011123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233120011123 is an equidigital number, since it uses as much as digits as its factorization.

21233120011123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21233120011123 its reverse (32111002133212), we get a palindrome (53344122144335).

The spelling of 21233120011123 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred twenty million, eleven thousand, one hundred twenty-three".