2100001222 has 64 divisors (see below), whose sum is σ = 3612542976. Its totient is φ = 914760000.

The previous prime is 2100001207. The next prime is 2100001231. The reversal of 2100001222 is 2221000012.

It is a junction number, because it is equal to n+sod(n) for n = 2100001199 and 2100001208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7748947 + ... + 7749217.

It is an arithmetic number, because the mean of its divisors is an integer number (56445984).

Almost surely, 2^2100001222 is an apocalyptic number.

2100001222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2100001222 is a deficient number, since it is larger than the sum of its proper divisors (1512541754).

2100001222 is a wasteful number, since it uses less digits than its factorization.

2100001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2100001222 is about 45825.7702826696. The cubic root of 2100001222 is about 1280.5794133792.

Adding to 2100001222 its reverse (2221000012), we get a palindrome (4321001234).

It can be divided in two parts, 21000012 and 22, that multiplied together give a palindrome (462000264).

The spelling of 2100001222 in words is "two billion, one hundred million, one thousand, two hundred twenty-two".