2112031042221 has 4 divisors (see below), whose sum is σ = 2816041389632. Its totient is φ = 1408020694812.

The previous prime is 2112031042217. The next prime is 2112031042223. The reversal of 2112031042221 is 1222401302112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2112031042221 - 2² = 2112031042217 is a prime.

It is a super-2 number, since 2×2112031042221² (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 (2112031042223) 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, 352005173701 + ... + 352005173706.

It is an arithmetic number, because the mean of its divisors is an integer number (704010347408).

Almost surely, 2^{2112031042221} is an apocalyptic number.

It is an amenable number.

2112031042221 is a deficient number, since it is larger than the sum of its proper divisors (704010347411).

2112031042221 is an equidigital number, since it uses as much as digits as its factorization.

2112031042221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704010347410.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 2112031042221 its reverse (1222401302112), we get a palindrome (3334432344333).

The spelling of 2112031042221 in words is "two trillion, one hundred twelve billion, thirty-one million, forty-two thousand, two hundred twenty-one".