12221111120 has 40 divisors (see below), whose sum is σ = 28604809800. Its totient is φ = 4855631360.

The previous prime is 12221111107. The next prime is 12221111173. The reversal of 12221111120 is 2111112221.

It can be written as a sum of positive squares in 4 ways, for example, as 1703377984 + 10517733136 = 41272^2 + 102556^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 12221111095 and 12221111104.

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, 500711 + ... + 524550.

It is an arithmetic number, because the mean of its divisors is an integer number (715120245).

Almost surely, 2^12221111120 is an apocalyptic number.

12221111120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221111120 is an abundant number, since it is smaller than the sum of its proper divisors (16383698680).

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

12221111120 is a wasteful number, since it uses less digits than its factorization.

12221111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025423 (or 1025417 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12221111120 its reverse (2111112221), we get a palindrome (14332223341).

It can be divided in two parts, 122211 and 11120, that added together give a palindrome (133331).

The spelling of 12221111120 in words is "twelve billion, two hundred twenty-one million, one hundred eleven thousand, one hundred twenty".