20212443331 has 4 divisors (see below), whose sum is σ = 20864457664. Its totient is φ = 19560429000.

The previous prime is 20212443311. The next prime is 20212443337. The reversal of 20212443331 is 13334421202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13334421202 = 2 ⋅6667210601.

It is a cyclic number.

It is not a de Polignac number, because 20212443331 - 2¹¹ = 20212441283 is a prime.

It is a super-2 number, since 2×20212443331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212443296 and 20212443305.

It is not an unprimeable number, because it can be changed into a prime (20212443337) 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, 326007120 + ... + 326007181.

It is an arithmetic number, because the mean of its divisors is an integer number (5216114416).

Almost surely, 2^20212443331 is an apocalyptic number.

20212443331 is a deficient number, since it is larger than the sum of its proper divisors (652014333).

20212443331 is an equidigital number, since it uses as much as digits as its factorization.

20212443331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652014332.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 20212443331 its reverse (13334421202), we get a palindrome (33546864533).

The spelling of 20212443331 in words is "twenty billion, two hundred twelve million, four hundred forty-three thousand, three hundred thirty-one".