1222100001 has 8 divisors (see below), whose sum is σ = 1810518560.
Its totient is φ = 814733316.
The previous prime is 1222099999. The next prime is 1222100017. The reversal of 1222100001 is 1000012221.
It is not a de Polignac number, because 1222100001 - 21 = 1222099999 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (1222100041) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22631455 + ... + 22631508.
It is an arithmetic number, because the mean of its divisors is an integer number (226314820).
Almost surely, 21222100001 is an apocalyptic number.
It is an amenable number.
1222100001 is a deficient number, since it is larger than the sum of its proper divisors (588418559).
1222100001 is an equidigital number, since it uses as much as digits as its factorization.
1222100001 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 45262972 (or 45262966 counting only the distinct ones).
The product of its (nonzero) digits is 8, while the sum is 9.
The square root of 1222100001 is about 34958.5468948582.
The cubic root of 1222100001 is about 1069.1424698318.
Adding to 1222100001 its reverse (1000012221), we get a palindrome (2222112222).
The spelling of 1222100001 in words is "one billion, two hundred twenty-two million, one hundred thousand, one".