12020020021001 has 16 divisors (see below), whose sum is σ = 12574479171408. Its totient is φ = 11478476563200.

The previous prime is 12020020020997. The next prime is 12020020021003. The reversal of 12020020021001 is 10012002002021.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2865165582400 + 9154854438601 = 1692680^2 + 3025699^2 .

It is a cyclic number.

It is not a de Polignac number, because 12020020021001 - 2² = 12020020020997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12020020021003) 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, 4735730 + ... + 6816683.

It is an arithmetic number, because the mean of its divisors is an integer number (785904948213).

Almost surely, 2^{12020020021001} is an apocalyptic number.

It is an amenable number.

12020020021001 is a deficient number, since it is larger than the sum of its proper divisors (554459150407).

12020020021001 is a wasteful number, since it uses less digits than its factorization.

12020020021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11552972.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12020020021001 its reverse (10012002002021), we get a palindrome (22032022023022).

The spelling of 12020020021001 in words is "twelve trillion, twenty billion, twenty million, twenty-one thousand, one".