2211211111201 has 4 divisors (see below), whose sum is σ = 2214794922372. Its totient is φ = 2207627300032.

The previous prime is 2211211111183. The next prime is 2211211111253. The reversal of 2211211111201 is 1021111121122.

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 794194662976 + 1417016448225 = 891176^2 + 1190385^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211211111201 - 2¹⁷ = 2211210980129 is a prime.

It is a super-2 number, since 2×2211211111201² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211211111301) 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, 1791904660 + ... + 1791905893.

It is an arithmetic number, because the mean of its divisors is an integer number (553698730593).

Almost surely, 2^{2211211111201} is an apocalyptic number.

It is an amenable number.

2211211111201 is a deficient number, since it is larger than the sum of its proper divisors (3583811171).

2211211111201 is an equidigital number, since it uses as much as digits as its factorization.

2211211111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583811170.

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

Adding to 2211211111201 its reverse (1021111121122), we get a palindrome (3232322232323).

The spelling of 2211211111201 in words is "two trillion, two hundred eleven billion, two hundred eleven million, one hundred eleven thousand, two hundred one".