12111220020 has 24 divisors (see below), whose sum is σ = 33911416224. Its totient is φ = 3229658656.

The previous prime is 12111220007. The next prime is 12111220061. The reversal of 12111220020 is 2002211121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12111219978 and 12111220005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100926774 + ... + 100926893.

It is an arithmetic number, because the mean of its divisors is an integer number (1412975676).

Almost surely, 2^12111220020 is an apocalyptic number.

12111220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111220020 is an abundant number, since it is smaller than the sum of its proper divisors (21800196204).

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

12111220020 is a wasteful number, since it uses less digits than its factorization.

12111220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201853679 (or 201853677 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12111220020 its reverse (2002211121), we get a palindrome (14113431141).

The spelling of 12111220020 in words is "twelve billion, one hundred eleven million, two hundred twenty thousand, twenty".