21312310033 has 8 divisors (see below), whose sum is σ = 24364784960. Its totient is φ = 18261799920.

The previous prime is 21312310003. The next prime is 21312310039. The reversal of 21312310033 is 33001321312.

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

It is a de Polignac number, because none of the positive numbers 2^k-21312310033 is a prime.

It is a super-2 number, since 2×21312310033² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21312310039) 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, 467883 + ... + 511408.

It is an arithmetic number, because the mean of its divisors is an integer number (3045598120).

Almost surely, 2^21312310033 is an apocalyptic number.

It is an amenable number.

21312310033 is a deficient number, since it is larger than the sum of its proper divisors (3052474927).

21312310033 is an equidigital number, since it uses as much as digits as its factorization.

21312310033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982407.

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

Adding to 21312310033 its reverse (33001321312), we get a palindrome (54313631345).

The spelling of 21312310033 in words is "twenty-one billion, three hundred twelve million, three hundred ten thousand, thirty-three".