12220443405 has 16 divisors (see below), whose sum is σ = 21725232960. Its totient is φ = 6517569744.

The previous prime is 12220443379. The next prime is 12220443409. The reversal of 12220443405 is 50434402221.

12220443405 is a `hidden beast` number, since 1 + 2 + 220 + 4 + 434 + 0 + 5 = 666.

It is not a de Polignac number, because 12220443405 - 2⁶ = 12220443341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220443409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45260767 + ... + 45261036.

It is an arithmetic number, because the mean of its divisors is an integer number (1357827060).

Almost surely, 2^12220443405 is an apocalyptic number.

12220443405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12220443405 is a deficient number, since it is larger than the sum of its proper divisors (9504789555).

12220443405 is an equidigital number, since it uses as much as digits as its factorization.

12220443405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90521817 (or 90521811 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 12220443405 its reverse (50434402221), we get a palindrome (62654845626).

It can be divided in two parts, 1222044 and 3405, that added together give a square (1225449 = 1107²).

The spelling of 12220443405 in words is "twelve billion, two hundred twenty million, four hundred forty-three thousand, four hundred five".