12111044420 has 24 divisors (see below), whose sum is σ = 25439457624. Its totient is φ = 4843224576.

The previous prime is 12111044399. The next prime is 12111044447. The reversal of 12111044420 is 2444011121.

It can be written as a sum of positive squares in 4 ways, for example, as 1027587136 + 11083457284 = 32056^2 + 105278^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12111044392 and 12111044401.

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, 11054 + ... + 156026.

It is an arithmetic number, because the mean of its divisors is an integer number (1059977401).

Almost surely, 2^12111044420 is an apocalyptic number.

12111044420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111044420 is an abundant number, since it is smaller than the sum of its proper divisors (13328413204).

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

12111044420 is a wasteful number, since it uses less digits than its factorization.

12111044420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149159 (or 149157 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12111044420 its reverse (2444011121), we get a palindrome (14555055541).

The spelling of 12111044420 in words is "twelve billion, one hundred eleven million, forty-four thousand, four hundred twenty".