2100001220222 has 12 divisors (see below), whose sum is σ = 3218449138080. Its totient is φ = 1027660169436.

The previous prime is 2100001220201. The next prime is 2100001220227. The reversal of 2100001220222 is 2220221000012.

It is a junction number, because it is equal to n+sod(n) for n = 2100001220197 and 2100001220206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100001220227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 237659822 + ... + 237668657.

It is an arithmetic number, because the mean of its divisors is an integer number (268204094840).

Almost surely, 2^{2100001220222} is an apocalyptic number.

2100001220222 is a deficient number, since it is larger than the sum of its proper divisors (1118447917858).

2100001220222 is an equidigital number, since it uses as much as digits as its factorization.

2100001220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475328575 (or 475328528 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 2100001220222 its reverse (2220221000012), we get a palindrome (4320222220234).

The spelling of 2100001220222 in words is "two trillion, one hundred billion, one million, two hundred twenty thousand, two hundred twenty-two".