21214442333 has 4 divisors (see below), whose sum is σ = 24245076960. Its totient is φ = 18183807708.

The previous prime is 21214442329. The next prime is 21214442371. The reversal of 21214442333 is 33324441212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21214442333 - 2² = 21214442329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21214442296 and 21214442305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214442393) 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, 1515317303 + ... + 1515317316.

It is an arithmetic number, because the mean of its divisors is an integer number (6061269240).

Almost surely, 2^21214442333 is an apocalyptic number.

It is an amenable number.

21214442333 is a deficient number, since it is larger than the sum of its proper divisors (3030634627).

21214442333 is an equidigital number, since it uses as much as digits as its factorization.

21214442333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030634626.

The product of its digits is 13824, while the sum is 29.

Adding to 21214442333 its reverse (33324441212), we get a palindrome (54538883545).

The spelling of 21214442333 in words is "twenty-one billion, two hundred fourteen million, four hundred forty-two thousand, three hundred thirty-three".