12021110220 has 72 divisors (see below), whose sum is σ = 39154482864. Its totient is φ = 2747681664.

The previous prime is 12021110201. The next prime is 12021110237. The reversal of 12021110220 is 2201112021.

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 = 12021110196 and 12021110205.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2041467 + ... + 2047346.

It is an arithmetic number, because the mean of its divisors is an integer number (543812262).

Almost surely, 2^12021110220 is an apocalyptic number.

12021110220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021110220 is an abundant number, since it is smaller than the sum of its proper divisors (27133372644).

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

12021110220 is a wasteful number, since it uses less digits than its factorization.

12021110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4088839 (or 4088830 counting only the distinct ones).

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

Adding to 12021110220 its reverse (2201112021), we get a palindrome (14222222241).

The spelling of 12021110220 in words is "twelve billion, twenty-one million, one hundred ten thousand, two hundred twenty".