22012122321 has 24 divisors (see below), whose sum is σ = 36953367360.
Its totient is φ = 12365161056.
The previous prime is 22012122289. The next prime is 22012122323. The reversal of 22012122321 is 12322121022.
22012122321 is a `hidden beast` number, since 220 + 1 + 2 + 122 + 321 = 666.
It is not a de Polignac number, because 22012122321 - 25 = 22012122289 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 22012122294 and 22012122303.
It is not an unprimeable number, because it can be changed into a prime (22012122323) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2957290 + ... + 2964723.
It is an arithmetic number, because the mean of its divisors is an integer number (1539723640).
Almost surely, 222012122321 is an apocalyptic number.
22012122321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.
It is an amenable number.
22012122321 is a deficient number, since it is larger than the sum of its proper divisors (14941245039).
22012122321 is a wasteful number, since it uses less digits than its factorization.
22012122321 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5922085 (or 5922082 counting only the distinct ones).
The product of its (nonzero) digits is 192, while the sum is 18.
Adding to 22012122321 its reverse (12322121022), we get a palindrome (34334243343).
The spelling of 22012122321 in words is "twenty-two billion, twelve million, one hundred twenty-two thousand, three hundred twenty-one".