21230011322221 has 8 divisors (see below), whose sum is σ = 24066409596320. Its totient is φ = 18565515973872.

The previous prime is 21230011322197. The next prime is 21230011322281. The reversal of 21230011322221 is 12222311003212.

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 21230011322221 - 2¹⁵ = 21230011289453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21230011322192 and 21230011322201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230011322281) 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, 42975731175 + ... + 42975731668.

It is an arithmetic number, because the mean of its divisors is an integer number (3008301199540).

Almost surely, 2^{21230011322221} is an apocalyptic number.

It is an amenable number.

21230011322221 is a deficient number, since it is larger than the sum of its proper divisors (2836398274099).

21230011322221 is a wasteful number, since it uses less digits than its factorization.

21230011322221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85951462875.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21230011322221 its reverse (12222311003212), we get a palindrome (33452322325433).

The spelling of 21230011322221 in words is "twenty-one trillion, two hundred thirty billion, eleven million, three hundred twenty-two thousand, two hundred twenty-one".