21111312331133 has 8 divisors (see below), whose sum is σ = 21238239865920. Its totient is φ = 20984390897760.

The previous prime is 21111312331117. The next prime is 21111312331147. The reversal of 21111312331133 is 33113321311112.

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

It is a cyclic number.

It is not a de Polignac number, because 21111312331133 - 2⁴ = 21111312331117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111312336133) 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, 5512913 + ... + 8521433.

It is an arithmetic number, because the mean of its divisors is an integer number (2654779983240).

Almost surely, 2^{21111312331133} is an apocalyptic number.

It is an amenable number.

21111312331133 is a deficient number, since it is larger than the sum of its proper divisors (126927534787).

21111312331133 is a wasteful number, since it uses less digits than its factorization.

21111312331133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050707.

The product of its digits is 972, while the sum is 26.

Adding to 21111312331133 its reverse (33113321311112), we get a palindrome (54224633642245).

The spelling of 21111312331133 in words is "twenty-one trillion, one hundred eleven billion, three hundred twelve million, three hundred thirty-one thousand, one hundred thirty-three".