21231133003 has 4 divisors (see below), whose sum is σ = 21231690480. Its totient is φ = 21230575528.

The previous prime is 21231132991. The next prime is 21231133031. The reversal of 21231133003 is 30033113212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21231133003 - 2³³ = 12641198411 is a prime.

It is a super-2 number, since 2×21231133003² (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 (21231133093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217063 + ... + 299296.

It is an arithmetic number, because the mean of its divisors is an integer number (5307922620).

Almost surely, 2^21231133003 is an apocalyptic number.

21231133003 is a deficient number, since it is larger than the sum of its proper divisors (557477).

21231133003 is an equidigital number, since it uses as much as digits as its factorization.

21231133003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557476.

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

Adding to 21231133003 its reverse (30033113212), we get a palindrome (51264246215).

The spelling of 21231133003 in words is "twenty-one billion, two hundred thirty-one million, one hundred thirty-three thousand, three".