20022212321 has 4 divisors (see below), whose sum is σ = 20034012612. Its totient is φ = 20010412032.

The previous prime is 20022212317. The next prime is 20022212339. The reversal of 20022212321 is 12321222002.

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 10000000000 + 10022212321 = 100000^2 + 100111^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022212321 - 2² = 20022212317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20022212321.

It is not an unprimeable number, because it can be changed into a prime (20022212311) 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, 5897600 + ... + 5900993.

It is an arithmetic number, because the mean of its divisors is an integer number (5008503153).

Almost surely, 2^20022212321 is an apocalyptic number.

It is an amenable number.

20022212321 is a deficient number, since it is larger than the sum of its proper divisors (11800291).

20022212321 is a wasteful number, since it uses less digits than its factorization.

20022212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11800290.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20022212321 its reverse (12321222002), we get a palindrome (32343434323).

The spelling of 20022212321 in words is "twenty billion, twenty-two million, two hundred twelve thousand, three hundred twenty-one".