2112124343021 has 24 divisors (see below), whose sum is σ = 2837987015616. Its totient is φ = 1548998747520.

The previous prime is 2112124342997. The next prime is 2112124343027. The reversal of 2112124343021 is 1203434212112.

It is a happy number.

It is not a de Polignac number, because 2112124343021 - 2²² = 2112120148717 is a prime.

It is a super-2 number, since 2×2112124343021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112124343027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115243721 + ... + 115262046.

It is an arithmetic number, because the mean of its divisors is an integer number (118249458984).

Almost surely, 2^{2112124343021} is an apocalyptic number.

It is an amenable number.

2112124343021 is a deficient number, since it is larger than the sum of its proper divisors (725862672595).

2112124343021 is a wasteful number, since it uses less digits than its factorization.

2112124343021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230505809 (or 230505802 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 2112124343021 its reverse (1203434212112), we get a palindrome (3315558555133).

The spelling of 2112124343021 in words is "two trillion, one hundred twelve billion, one hundred twenty-four million, three hundred forty-three thousand, twenty-one".