2100121112222 has 16 divisors (see below), whose sum is σ = 3600317349600. Its totient is φ = 900024473088.

The previous prime is 2100121112197. The next prime is 2100121112227. The reversal of 2100121112222 is 2222111210012.

It is a self number, because there is not a number n which added to its sum of digits gives 2100121112222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100121112227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1806803 + ... + 2732174.

It is an arithmetic number, because the mean of its divisors is an integer number (225019834350).

Almost surely, 2^{2100121112222} is an apocalyptic number.

2100121112222 is a deficient number, since it is larger than the sum of its proper divisors (1500196237378).

2100121112222 is a wasteful number, since it uses less digits than its factorization.

2100121112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4572035.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2100121112222 its reverse (2222111210012), we get a palindrome (4322232322234).

The spelling of 2100121112222 in words is "two trillion, one hundred billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twenty-two".