21322101301221 has 64 divisors (see below), whose sum is σ = 36473204275200. Its totient is φ = 10785646596096.

The previous prime is 21322101301181. The next prime is 21322101301223. The reversal of 21322101301221 is 12210310122312.

It is not a de Polignac number, because 21322101301221 - 2¹⁴ = 21322101284837 is a prime.

It is a super-2 number, since 2×21322101301221² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322101301223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10364580 + ... + 12250253.

It is an arithmetic number, because the mean of its divisors is an integer number (569893816800).

Almost surely, 2^{21322101301221} is an apocalyptic number.

21322101301221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21322101301221 is a deficient number, since it is larger than the sum of its proper divisors (15151102973979).

21322101301221 is a wasteful number, since it uses less digits than its factorization.

21322101301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22615018.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21322101301221 its reverse (12210310122312), we get a palindrome (33532411423533).

The spelling of 21322101301221 in words is "twenty-one trillion, three hundred twenty-two billion, one hundred one million, three hundred one thousand, two hundred twenty-one".