21111333245 has 8 divisors (see below), whose sum is σ = 25348111584. Its totient is φ = 16879392144.

The previous prime is 21111333233. The next prime is 21111333259. The reversal of 21111333245 is 54233311112.

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 21111333245 - 2²⁰ = 21110284669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1199699 + ... + 1217168.

It is an arithmetic number, because the mean of its divisors is an integer number (3168513948).

Almost surely, 2^21111333245 is an apocalyptic number.

It is an amenable number.

21111333245 is a deficient number, since it is larger than the sum of its proper divisors (4236778339).

21111333245 is a wasteful number, since it uses less digits than its factorization.

21111333245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418619.

The product of its digits is 2160, while the sum is 26.

Adding to 21111333245 its reverse (54233311112), we get a palindrome (75344644357).

The spelling of 21111333245 in words is "twenty-one billion, one hundred eleven million, three hundred thirty-three thousand, two hundred forty-five".