2112303111221 has 8 divisors (see below), whose sum is σ = 2223700108320. Its totient is φ = 2000928429072.

The previous prime is 2112303111197. The next prime is 2112303111223. The reversal of 2112303111221 is 1221113032112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112303111221 is a prime.

It is a super-2 number, since 2×2112303111221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112303111193 and 2112303111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112303111223) 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, 5384255 + ... + 5763228.

It is an arithmetic number, because the mean of its divisors is an integer number (277962513540).

Almost surely, 2^{2112303111221} is an apocalyptic number.

It is an amenable number.

2112303111221 is a deficient number, since it is larger than the sum of its proper divisors (111396997099).

2112303111221 is a wasteful number, since it uses less digits than its factorization.

2112303111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11157475.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2112303111221 its reverse (1221113032112), we get a palindrome (3333416143333).

The spelling of 2112303111221 in words is "two trillion, one hundred twelve billion, three hundred three million, one hundred eleven thousand, two hundred twenty-one".