20212100111201 has 16 divisors (see below), whose sum is σ = 20468359573200. Its totient is φ = 19957210011648.

The previous prime is 20212100111143. The next prime is 20212100111227. The reversal of 20212100111201 is 10211100121202.

It can be written as a sum of positive squares in 8 ways, for example, as 12212683462225 + 7999416648976 = 3494665^2 + 2828324^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212100111201 - 2¹⁰ = 20212100110177 is a prime.

It is a super-2 number, since 2×20212100111201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20212100110201) 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, 756172805 + ... + 756199533.

It is an arithmetic number, because the mean of its divisors is an integer number (1279272473325).

Almost surely, 2^{20212100111201} is an apocalyptic number.

It is an amenable number.

20212100111201 is a deficient number, since it is larger than the sum of its proper divisors (256259461999).

20212100111201 is a wasteful number, since it uses less digits than its factorization.

20212100111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51988.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20212100111201 its reverse (10211100121202), we get a palindrome (30423200232403).

The spelling of 20212100111201 in words is "twenty trillion, two hundred twelve billion, one hundred million, one hundred eleven thousand, two hundred one".