12111222020 has 12 divisors (see below), whose sum is σ = 25433566284. Its totient is φ = 4844488800.

The previous prime is 12111221977. The next prime is 12111222029. The reversal of 12111222020 is 2022211121.

It can be written as a sum of positive squares in 2 ways, for example, as 1971537604 + 10139684416 = 44402^2 + 100696^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12111221986 and 12111222004.

It is not an unprimeable number, because it can be changed into a prime (12111222029) 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, 302780531 + ... + 302780570.

It is an arithmetic number, because the mean of its divisors is an integer number (2119463857).

Almost surely, 2^12111222020 is an apocalyptic number.

12111222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111222020 is an abundant number, since it is smaller than the sum of its proper divisors (13322344264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12111222020 is a wasteful number, since it uses less digits than its factorization.

12111222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605561110 (or 605561108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12111222020 its reverse (2022211121), we get a palindrome (14133433141).

The spelling of 12111222020 in words is "twelve billion, one hundred eleven million, two hundred twenty-two thousand, twenty".