21211223323 has 8 divisors (see below), whose sum is σ = 23435418528. Its totient is φ = 19095525504.

The previous prime is 21211223317. The next prime is 21211223339. The reversal of 21211223323 is 32332211212.

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

It is a cyclic number.

It is not a de Polignac number, because 21211223323 - 2⁵ = 21211223291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21211223294 and 21211223303.

It is not an unprimeable number, because it can be changed into a prime (21211223393) 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, 27123936 + ... + 27124717.

It is an arithmetic number, because the mean of its divisors is an integer number (2929427316).

Almost surely, 2^21211223323 is an apocalyptic number.

21211223323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21211223323 is a deficient number, since it is larger than the sum of its proper divisors (2224195205).

21211223323 is a wasteful number, since it uses less digits than its factorization.

21211223323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54248693.

The product of its digits is 864, while the sum is 22.

Adding to 21211223323 its reverse (32332211212), we get a palindrome (53543434535).

The spelling of 21211223323 in words is "twenty-one billion, two hundred eleven million, two hundred twenty-three thousand, three hundred twenty-three".