22001210321 has 4 divisors (see below), whose sum is σ = 22004531892. Its totient is φ = 21997888752.

The previous prime is 22001210311. The next prime is 22001210323. The reversal of 22001210321 is 12301210022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4220321296 + 17780889025 = 64964^2 + 133345^2 .

It is a cyclic number.

It is not a de Polignac number, because 22001210321 - 2¹⁰ = 22001209297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22001210296 and 22001210305.

It is not an unprimeable number, because it can be changed into a prime (22001210323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1650830 + ... + 1664103.

It is an arithmetic number, because the mean of its divisors is an integer number (5501132973).

Almost surely, 2^22001210321 is an apocalyptic number.

It is an amenable number.

22001210321 is a deficient number, since it is larger than the sum of its proper divisors (3321571).

22001210321 is an equidigital number, since it uses as much as digits as its factorization.

22001210321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3321570.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 22001210321 its reverse (12301210022), we get a palindrome (34302420343).

The spelling of 22001210321 in words is "twenty-two billion, one million, two hundred ten thousand, three hundred twenty-one".