2112213421 has 4 divisors (see below), whose sum is σ = 2126389500. Its totient is φ = 2098037344.

The previous prime is 2112213401. The next prime is 2112213431. The reversal of 2112213421 is 1243122112.

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 1116495396 + 995718025 = 33414^2 + 31555^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112213421 - 2⁹ = 2112212909 is a prime.

It is a super-2 number, since 2×2112213421² = 8922891071705046482, which 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 (2112213401) 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, 7087816 + ... + 7088113.

It is an arithmetic number, because the mean of its divisors is an integer number (531597375).

Almost surely, 2^2112213421 is an apocalyptic number.

It is an amenable number.

2112213421 is a deficient number, since it is larger than the sum of its proper divisors (14176079).

2112213421 is a wasteful number, since it uses less digits than its factorization.

2112213421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14176078.

The product of its digits is 192, while the sum is 19.

The square root of 2112213421 is about 45958.8231028602. The cubic root of 2112213421 is about 1283.0569474104.

Adding to 2112213421 its reverse (1243122112), we get a palindrome (3355335533).

It can be divided in two parts, 21122 and 13421, that added together give a palindrome (34543).

The spelling of 2112213421 in words is "two billion, one hundred twelve million, two hundred thirteen thousand, four hundred twenty-one".