21020000111201 has 16 divisors (see below), whose sum is σ = 26015298825600. Its totient is φ = 16538297084928.

The previous prime is 21020000111197. The next prime is 21020000111203. The reversal of 21020000111201 is 10211100002012.

It is a cyclic number.

It is not a de Polignac number, because 21020000111201 - 2² = 21020000111197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21020000111203) 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, 645204416 + ... + 645236993.

It is an arithmetic number, because the mean of its divisors is an integer number (1625956176600).

Almost surely, 2^{21020000111201} is an apocalyptic number.

It is an amenable number.

21020000111201 is a deficient number, since it is larger than the sum of its proper divisors (4995298714399).

21020000111201 is a wasteful number, since it uses less digits than its factorization.

21020000111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290441608.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21020000111201 its reverse (10211100002012), we get a palindrome (31231100113213).

The spelling of 21020000111201 in words is "twenty-one trillion, twenty billion, one hundred eleven thousand, two hundred one".