12020220331 has 6 divisors (see below), whose sum is σ = 13982705340. Its totient is φ = 10303045956.

The previous prime is 12020220323. The next prime is 12020220389. The reversal of 12020220331 is 13302202021.

It is not a de Polignac number, because 12020220331 - 2³ = 12020220323 is a prime.

It is a super-2 number, since 2×12020220331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12020220031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122655261 + ... + 122655358.

It is an arithmetic number, because the mean of its divisors is an integer number (2330450890).

Almost surely, 2^12020220331 is an apocalyptic number.

12020220331 is a deficient number, since it is larger than the sum of its proper divisors (1962485009).

12020220331 is an equidigital number, since it uses as much as digits as its factorization.

12020220331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245310633 (or 245310626 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 12020220331 its reverse (13302202021), we get a palindrome (25322422352).

The spelling of 12020220331 in words is "twelve billion, twenty million, two hundred twenty thousand, three hundred thirty-one".