2221112110121 has 4 divisors (see below), whose sum is σ = 2221119140100. Its totient is φ = 2221105080144.

The previous prime is 2221112110117. The next prime is 2221112110159. The reversal of 2221112110121 is 1210112111222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 955349856400 + 1265762253721 = 977420^2 + 1125061^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221112110121 - 2² = 2221112110117 is a prime.

It is a super-2 number, since 2×2221112110121² (a number of 25 digits) contains 22 as substring.

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 2221112110121.

It is not an unprimeable number, because it can be changed into a prime (2221112100121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3017606 + ... + 3680783.

It is an arithmetic number, because the mean of its divisors is an integer number (555279785025).

Almost surely, 2^{2221112110121} is an apocalyptic number.

It is an amenable number.

2221112110121 is a deficient number, since it is larger than the sum of its proper divisors (7029979).

2221112110121 is an equidigital number, since it uses as much as digits as its factorization.

2221112110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7029978.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2221112110121 its reverse (1210112111222), we get a palindrome (3431224221343).

The spelling of 2221112110121 in words is "two trillion, two hundred twenty-one billion, one hundred twelve million, one hundred ten thousand, one hundred twenty-one".