12021442145 has 8 divisors (see below), whose sum is σ = 14500476456. Its totient is φ = 9567323136.

The previous prime is 12021442129. The next prime is 12021442151. The reversal of 12021442145 is 54124412021.

It can be written as a sum of positive squares in 4 ways, for example, as 2427631441 + 9593810704 = 49271^2 + 97948^2 .

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 12021442145 - 2⁴ = 12021442129 is a prime.

It is a Duffinian 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, 6227762 + ... + 6229691.

It is an arithmetic number, because the mean of its divisors is an integer number (1812559557).

Almost surely, 2^12021442145 is an apocalyptic number.

It is an amenable number.

12021442145 is a deficient number, since it is larger than the sum of its proper divisors (2479034311).

12021442145 is a wasteful number, since it uses less digits than its factorization.

12021442145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12457651.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 12021442145 its reverse (54124412021), we get a palindrome (66145854166).

The spelling of 12021442145 in words is "twelve billion, twenty-one million, four hundred forty-two thousand, one hundred forty-five".