212443233121 has 8 divisors (see below), whose sum is σ = 242814261824. Its totient is φ = 182077703280.

The previous prime is 212443233113. The next prime is 212443233131. The reversal of 212443233121 is 121332344212.

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

It is a cyclic number.

It is not a de Polignac number, because 212443233121 - 2³ = 212443233113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212443233121.

It is not an unprimeable number, because it can be changed into a prime (212443233131) 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, 1291590 + ... + 1446751.

It is an arithmetic number, because the mean of its divisors is an integer number (30351782728).

Almost surely, 2^212443233121 is an apocalyptic number.

It is an amenable number.

212443233121 is a deficient number, since it is larger than the sum of its proper divisors (30371028703).

212443233121 is a wasteful number, since it uses less digits than its factorization.

212443233121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749431.

The product of its digits is 6912, while the sum is 28.

Adding to 212443233121 its reverse (121332344212), we get a palindrome (333775577333).

The spelling of 212443233121 in words is "two hundred twelve billion, four hundred forty-three million, two hundred thirty-three thousand, one hundred twenty-one".