12122145545 has 8 divisors (see below), whose sum is σ = 15402255624. Its totient is φ = 9127262464.

The previous prime is 12122145527. The next prime is 12122145557. The reversal of 12122145545 is 54554122121.

It can be written as a sum of positive squares in 4 ways, for example, as 3294415609 + 8827729936 = 57397^2 + 93956^2 .

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

It is not a de Polignac number, because 12122145545 - 2¹⁰ = 12122144521 is a prime.

It is a super-2 number, since 2×12122145545² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71306654 + ... + 71306823.

It is an arithmetic number, because the mean of its divisors is an integer number (1925281953).

Almost surely, 2^12122145545 is an apocalyptic number.

It is an amenable number.

12122145545 is a deficient number, since it is larger than the sum of its proper divisors (3280110079).

12122145545 is a wasteful number, since it uses less digits than its factorization.

12122145545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142613499.

The product of its digits is 16000, while the sum is 32.

Adding to 12122145545 its reverse (54554122121), we get a palindrome (66676267666).

The spelling of 12122145545 in words is "twelve billion, one hundred twenty-two million, one hundred forty-five thousand, five hundred forty-five".