12211111020 has 48 divisors (see below), whose sum is σ = 34221908448. Its totient is φ = 3253363200.

The previous prime is 12211110979. The next prime is 12211111021. The reversal of 12211111020 is 2011111221.

It is a super-2 number, since 2×12211111020² (a number of 21 digits) contains 22 as substring.

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 = 12211110987 and 12211111005.

It is not an unprimeable number, because it can be changed into a prime (12211111021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24081 + ... + 158120.

It is an arithmetic number, because the mean of its divisors is an integer number (712956426).

Almost surely, 2^12211111020 is an apocalyptic number.

12211111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211111020 is an abundant number, since it is smaller than the sum of its proper divisors (22010797428).

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

12211111020 is a wasteful number, since it uses less digits than its factorization.

12211111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183330 (or 183328 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12211111020 its reverse (2011111221), we get a palindrome (14222222241).

The spelling of 12211111020 in words is "twelve billion, two hundred eleven million, one hundred eleven thousand, twenty".