21111031133 has 32 divisors (see below), whose sum is σ = 22452163200. Its totient is φ = 19826712576.

The previous prime is 21111031127. The next prime is 21111031147. The reversal of 21111031133 is 33113011112.

It is a cyclic number.

It is not a de Polignac number, because 21111031133 - 2¹⁶ = 21110965597 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 (21111031633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37497110 + ... + 37497672.

It is an arithmetic number, because the mean of its divisors is an integer number (701630100).

Almost surely, 2^21111031133 is an apocalyptic number.

It is an amenable number.

21111031133 is a deficient number, since it is larger than the sum of its proper divisors (1341132067).

21111031133 is a wasteful number, since it uses less digits than its factorization.

21111031133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 21111031133 its reverse (33113011112), we get a palindrome (54224042245).

The spelling of 21111031133 in words is "twenty-one billion, one hundred eleven million, thirty-one thousand, one hundred thirty-three".