12212211020 has 24 divisors (see below), whose sum is σ = 25802985264. Its totient is φ = 4854914496.

The previous prime is 12212211017. The next prime is 12212211029. The reversal of 12212211020 is 2011221221.

It is a junction number, because it is equal to n+sod(n) for n = 12212210986 and 12212211004.

It is not an unprimeable number, because it can be changed into a prime (12212211029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1869779 + ... + 1876298.

It is an arithmetic number, because the mean of its divisors is an integer number (1075124386).

Almost surely, 2^12212211020 is an apocalyptic number.

12212211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212211020 is an abundant number, since it is smaller than the sum of its proper divisors (13590774244).

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

12212211020 is a wasteful number, since it uses less digits than its factorization.

12212211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3746249 (or 3746247 counting only the distinct ones).

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

Adding to 12212211020 its reverse (2011221221), we get a palindrome (14223432241).

The spelling of 12212211020 in words is "twelve billion, two hundred twelve million, two hundred eleven thousand, twenty".