221404020123321 has 48 divisors (see below), whose sum is σ = 367412820203520. Its totient is φ = 125851829898240.

The previous prime is 221404020123289. The next prime is 221404020123329. The reversal of 221404020123321 is 123321020404122.

221404020123321 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 0 + 402 + 0 + 1 + 233 + 21 = 666.

It is not a de Polignac number, because 221404020123321 - 2⁵ = 221404020123289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221404020123329) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 791739901 + ... + 792019493.

It is an arithmetic number, because the mean of its divisors is an integer number (7654433754240).

Almost surely, 2^{221404020123321} is an apocalyptic number.

221404020123321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221404020123321 is a deficient number, since it is larger than the sum of its proper divisors (146008800080199).

221404020123321 is a wasteful number, since it uses less digits than its factorization.

221404020123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345606 (or 345603 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 221404020123321 its reverse (123321020404122), we get a palindrome (344725040527443).

The spelling of 221404020123321 in words is "two hundred twenty-one trillion, four hundred four billion, twenty million, one hundred twenty-three thousand, three hundred twenty-one".