21223356339 has 8 divisors (see below), whose sum is σ = 28298763712. Its totient is φ = 14148426600.

The previous prime is 21223356337. The next prime is 21223356347. The reversal of 21223356339 is 93365332212.

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

It is not a de Polignac number, because 21223356339 - 2¹ = 21223356337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21223356297 and 21223356306.

It is not an unprimeable number, because it can be changed into a prime (21223356337) 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, 1872 + ... + 206034.

It is an arithmetic number, because the mean of its divisors is an integer number (3537345464).

Almost surely, 2^21223356339 is an apocalyptic number.

21223356339 is a deficient number, since it is larger than the sum of its proper divisors (7075407373).

21223356339 is a wasteful number, since it uses less digits than its factorization.

21223356339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238817.

The product of its digits is 174960, while the sum is 39.

The spelling of 21223356339 in words is "twenty-one billion, two hundred twenty-three million, three hundred fifty-six thousand, three hundred thirty-nine".