2121123323112 has 16 divisors (see below), whose sum is σ = 5302808307840. Its totient is φ = 707041107696.

The previous prime is 2121123323107. The next prime is 2121123323119. The reversal of 2121123323112 is 2113233211212.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 88380138463 = 2121123323112 / (2 + 1 + 2 + 1 + 1 + 2 + 3 + 3 + 2 + 3 + 1 + 1 + 2).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (2121123323119) 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, 44190069208 + ... + 44190069255.

It is an arithmetic number, because the mean of its divisors is an integer number (331425519240).

Almost surely, 2^{2121123323112} is an apocalyptic number.

It is an amenable number.

2121123323112 is an abundant number, since it is smaller than the sum of its proper divisors (3181684984728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121123323112 is a wasteful number, since it uses less digits than its factorization.

2121123323112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88380138472 (or 88380138468 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

Adding to 2121123323112 its reverse (2113233211212), we get a palindrome (4234356534324).

The spelling of 2121123323112 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-three million, three hundred twenty-three thousand, one hundred twelve".