212021304443 has 16 divisors (see below), whose sum is σ = 228707017056. Its totient is φ = 195389625600.

The previous prime is 212021304349. The next prime is 212021304491. The reversal of 212021304443 is 344403120212.

It is not a de Polignac number, because 212021304443 - 2³⁶ = 143301827707 is a prime.

It is a super-2 number, since 2×212021304443² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021304343) 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, 26830793 + ... + 26838693.

It is an arithmetic number, because the mean of its divisors is an integer number (14294188566).

Almost surely, 2^212021304443 is an apocalyptic number.

212021304443 is a deficient number, since it is larger than the sum of its proper divisors (16685712613).

212021304443 is a wasteful number, since it uses less digits than its factorization.

212021304443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11054.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 212021304443 its reverse (344403120212), we get a palindrome (556424424655).

The spelling of 212021304443 in words is "two hundred twelve billion, twenty-one million, three hundred four thousand, four hundred forty-three".