212204021243 has 16 divisors (see below), whose sum is σ = 225263498880. Its totient is φ = 199339346304.

The previous prime is 212204021231. The next prime is 212204021257. The reversal of 212204021243 is 342120402212.

It is a cyclic number.

It is not a de Polignac number, because 212204021243 - 2⁶ = 212204021179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212204021443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1261880 + ... + 1420122.

It is an arithmetic number, because the mean of its divisors is an integer number (14078968680).

Almost surely, 2^212204021243 is an apocalyptic number.

212204021243 is a deficient number, since it is larger than the sum of its proper divisors (13059477637).

212204021243 is a wasteful number, since it uses less digits than its factorization.

212204021243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158858.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 212204021243 its reverse (342120402212), we get a palindrome (554324423455).

The spelling of 212204021243 in words is "two hundred twelve billion, two hundred four million, twenty-one thousand, two hundred forty-three".