12041221601 has 16 divisors (see below), whose sum is σ = 12856772304. Its totient is φ = 11237935104.

The previous prime is 12041221589. The next prime is 12041221613. The reversal of 12041221601 is 10612214021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12041221589) and next prime (12041221613).

It can be written as a sum of positive squares in 8 ways, for example, as 2093154001 + 9948067600 = 45751^2 + 99740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12041221601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12041221691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1162421 + ... + 1172733.

It is an arithmetic number, because the mean of its divisors is an integer number (803548269).

Almost surely, 2^12041221601 is an apocalyptic number.

It is an amenable number.

12041221601 is a deficient number, since it is larger than the sum of its proper divisors (815550703).

12041221601 is a wasteful number, since it uses less digits than its factorization.

12041221601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10900.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 12041221601 its reverse (10612214021), we get a palindrome (22653435622).

The spelling of 12041221601 in words is "twelve billion, forty-one million, two hundred twenty-one thousand, six hundred one".