21330000333231 has 4 divisors (see below), whose sum is σ = 28440000444312. Its totient is φ = 14220000222152.

The previous prime is 21330000333223. The next prime is 21330000333349. The reversal of 21330000333231 is 13233300003312.

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 21330000333231 - 2³ = 21330000333223 is a prime.

It is a super-2 number, since 2×21330000333231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330001333231) 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, 3555000055536 + ... + 3555000055541.

It is an arithmetic number, because the mean of its divisors is an integer number (7110000111078).

Almost surely, 2^{21330000333231} is an apocalyptic number.

21330000333231 is a deficient number, since it is larger than the sum of its proper divisors (7110000111081).

21330000333231 is an equidigital number, since it uses as much as digits as its factorization.

21330000333231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7110000111080.

The product of its (nonzero) digits is 2916, while the sum is 24.

Adding to 21330000333231 its reverse (13233300003312), we get a palindrome (34563300336543).

The spelling of 21330000333231 in words is "twenty-one trillion, three hundred thirty billion, three hundred thirty-three thousand, two hundred thirty-one".