12020442231 has 64 divisors (see below), whose sum is σ = 19383091200. Its totient is φ = 6481987200.

The previous prime is 12020442227. The next prime is 12020442257. The reversal of 12020442231 is 13224402021.

It is not a de Polignac number, because 12020442231 - 2² = 12020442227 is a prime.

It is a super-2 number, since 2×12020442231² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 12020442198 and 12020442207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020442221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5030385 + ... + 5032773.

It is an arithmetic number, because the mean of its divisors is an integer number (302860800).

Almost surely, 2^12020442231 is an apocalyptic number.

12020442231 is a deficient number, since it is larger than the sum of its proper divisors (7362648969).

12020442231 is a wasteful number, since it uses less digits than its factorization.

12020442231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 12020442231 its reverse (13224402021), we get a palindrome (25244844252).

The spelling of 12020442231 in words is "twelve billion, twenty million, four hundred forty-two thousand, two hundred thirty-one".