21223311123321 has 32 divisors (see below), whose sum is σ = 32294574816000. Its totient is φ = 13765257002880.

The previous prime is 21223311123263. The next prime is 21223311123379. The reversal of 21223311123321 is 12332111332212.

21223311123321 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 3 + 311 + 1 + 23 + 321 = 666.

It is an interprime number because it is at equal distance from previous prime (21223311123263) and next prime (21223311123379).

It is not a de Polignac number, because 21223311123321 - 2⁷ = 21223311123193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21223311123221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10455741 + ... + 12319461.

It is an arithmetic number, because the mean of its divisors is an integer number (1009205463000).

Almost surely, 2^{21223311123321} is an apocalyptic number.

It is an amenable number.

21223311123321 is a deficient number, since it is larger than the sum of its proper divisors (11071263692679).

21223311123321 is a wasteful number, since it uses less digits than its factorization.

21223311123321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875166 (or 1875160 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 21223311123321 its reverse (12332111332212), we get a palindrome (33555422455533).

The spelling of 21223311123321 in words is "twenty-one trillion, two hundred twenty-three billion, three hundred eleven million, one hundred twenty-three thousand, three hundred twenty-one".