12020040401 has 4 divisors (see below), whose sum is σ = 12139050804. Its totient is φ = 11901030000.

The previous prime is 12020040391. The next prime is 12020040443. The reversal of 12020040401 is 10404002021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11690799376 + 329241025 = 108124^2 + 18145^2 .

It is a cyclic number.

It is not a de Polignac number, because 12020040401 - 2¹⁰ = 12020039377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12020040481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59505050 + ... + 59505251.

It is an arithmetic number, because the mean of its divisors is an integer number (3034762701).

Almost surely, 2^12020040401 is an apocalyptic number.

It is an amenable number.

12020040401 is a deficient number, since it is larger than the sum of its proper divisors (119010403).

12020040401 is a wasteful number, since it uses less digits than its factorization.

12020040401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119010402.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 12020040401 its reverse (10404002021), we get a palindrome (22424042422).

The spelling of 12020040401 in words is "twelve billion, twenty million, forty thousand, four hundred one".