12261055405 has 8 divisors (see below), whose sum is σ = 14716449792. Its totient is φ = 9806722128.

The previous prime is 12261055321. The next prime is 12261055439. The reversal of 12261055405 is 50455016221.

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 12261055405 - 2¹³ = 12261047213 is a prime.

It is a Duffinian number.

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, 239629 + ... + 286258.

It is an arithmetic number, because the mean of its divisors is an integer number (1839556224).

Almost surely, 2^12261055405 is an apocalyptic number.

It is an amenable number.

12261055405 is a deficient number, since it is larger than the sum of its proper divisors (2455394387).

12261055405 is an equidigital number, since it uses as much as digits as its factorization.

12261055405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530555.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 12261055405 in words is "twelve billion, two hundred sixty-one million, fifty-five thousand, four hundred five".