21133320031 has 8 divisors (see below), whose sum is σ = 21816720000. Its totient is φ = 20450025120.

The previous prime is 21133319993. The next prime is 21133320077. The reversal of 21133320031 is 13002333112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21133320031 is a prime.

It is a super-2 number, since 2×21133320031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21133319990 and 21133320008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133323031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715545 + ... + 744493.

It is an arithmetic number, because the mean of its divisors is an integer number (2727090000).

Almost surely, 2^21133320031 is an apocalyptic number.

21133320031 is a deficient number, since it is larger than the sum of its proper divisors (683399969).

21133320031 is a wasteful number, since it uses less digits than its factorization.

21133320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52529.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21133320031 its reverse (13002333112), we get a palindrome (34135653143).

The spelling of 21133320031 in words is "twenty-one billion, one hundred thirty-three million, three hundred twenty thousand, thirty-one".