21111112133233 has 16 divisors (see below), whose sum is σ = 22320961931520. Its totient is φ = 19911142864656.

The previous prime is 21111112133207. The next prime is 21111112133257. The reversal of 21111112133233 is 33233121111112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21111112133233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21111112133198 and 21111112133207.

It is not an unprimeable number, because it can be changed into a prime (21111112130233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137952466 + ... + 138105412.

It is an arithmetic number, because the mean of its divisors is an integer number (1395060120720).

Almost surely, 2^{21111112133233} is an apocalyptic number.

It is an amenable number.

21111112133233 is a deficient number, since it is larger than the sum of its proper divisors (1209849798287).

21111112133233 is a wasteful number, since it uses less digits than its factorization.

21111112133233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185196.

The product of its digits is 648, while the sum is 25.

Adding to 21111112133233 its reverse (33233121111112), we get a palindrome (54344233244345).

The spelling of 21111112133233 in words is "twenty-one trillion, one hundred eleven billion, one hundred twelve million, one hundred thirty-three thousand, two hundred thirty-three".