2100112221221 has 8 divisors (see below), whose sum is σ = 2541312267840. Its totient is φ = 1694208178368.

The previous prime is 2100112221217. The next prime is 2100112221269. The reversal of 2100112221221 is 1221222110012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2100112221221 - 2² = 2100112221217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2100112221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100112221271) 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, 8824000811 + ... + 8824001048.

It is an arithmetic number, because the mean of its divisors is an integer number (317664033480).

Almost surely, 2^{2100112221221} is an apocalyptic number.

It is an amenable number.

2100112221221 is a deficient number, since it is larger than the sum of its proper divisors (441200046619).

2100112221221 is a wasteful number, since it uses less digits than its factorization.

2100112221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17648001883.

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

Adding to 2100112221221 its reverse (1221222110012), we get a palindrome (3321334331233).

The spelling of 2100112221221 in words is "two trillion, one hundred billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".