12261231055 has 8 divisors (see below), whose sum is σ = 14714074800. Its totient is φ = 9808586496.

The previous prime is 12261231053. The next prime is 12261231067. The reversal of 12261231055 is 55013216221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12261231055 - 2¹ = 12261231053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12261231053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195391 + ... + 250399.

It is an arithmetic number, because the mean of its divisors is an integer number (1839259350).

Almost surely, 2^12261231055 is an apocalyptic number.

12261231055 is a deficient number, since it is larger than the sum of its proper divisors (2452843745).

12261231055 is an equidigital number, since it uses as much as digits as its factorization.

12261231055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99593.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 12261231055 its reverse (55013216221), we get a palindrome (67274447276).

The spelling of 12261231055 in words is "twelve billion, two hundred sixty-one million, two hundred thirty-one thousand, fifty-five".