12221120055 has 32 divisors (see below), whose sum is σ = 21793708800. Its totient is φ = 5811651072.

The previous prime is 12221120039. The next prime is 12221120101. The reversal of 12221120055 is 55002112221.

It is not a de Polignac number, because 12221120055 - 2⁴ = 12221120039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1256365 + ... + 1266054.

It is an arithmetic number, because the mean of its divisors is an integer number (681053400).

Almost surely, 2^12221120055 is an apocalyptic number.

12221120055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12221120055 is a deficient number, since it is larger than the sum of its proper divisors (9572588745).

12221120055 is a wasteful number, since it uses less digits than its factorization.

12221120055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522463.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 12221120055 its reverse (55002112221), we get a palindrome (67223232276).

The spelling of 12221120055 in words is "twelve billion, two hundred twenty-one million, one hundred twenty thousand, fifty-five".