21233122323111 has 20 divisors (see below), whose sum is σ = 32492239585344. Its totient is φ = 13810160858400.

The previous prime is 21233122323107. The next prime is 21233122323139. The reversal of 21233122323111 is 11132322133212.

21233122323111 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 312 + 2 + 32 + 311 + 1 = 666.

It is not a de Polignac number, because 21233122323111 - 2² = 21233122323107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233122321111) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3196793175 + ... + 3196799816.

Almost surely, 2^{21233122323111} is an apocalyptic number.

21233122323111 is a deficient number, since it is larger than the sum of its proper divisors (11259117262233).

21233122323111 is an equidigital number, since it uses as much as digits as its factorization.

21233122323111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6393593044 (or 6393593035 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 21233122323111 its reverse (11132322133212), we get a palindrome (32365444456323).

The spelling of 21233122323111 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred twenty-two million, three hundred twenty-three thousand, one hundred eleven".