12155552514422 has 4 divisors (see below), whose sum is σ = 18233328771636. Its totient is φ = 6077776257210.

The previous prime is 12155552514421. The next prime is 12155552514431. The reversal of 12155552514422 is 22441525555121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155552514421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3038888128604 + ... + 3038888128607.

It is an arithmetic number, because the mean of its divisors is an integer number (4558332192909).

Almost surely, 2^{12155552514422} is an apocalyptic number.

12155552514422 is a deficient number, since it is larger than the sum of its proper divisors (6077776257214).

12155552514422 is an equidigital number, since it uses as much as digits as its factorization.

12155552514422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6077776257213.

The product of its digits is 800000, while the sum is 44.

The spelling of 12155552514422 in words is "twelve trillion, one hundred fifty-five billion, five hundred fifty-two million, five hundred fourteen thousand, four hundred twenty-two".