1001201122211 has 4 divisors (see below), whose sum is σ = 1017614255424. Its totient is φ = 984787989000.

The previous prime is 1001201122189. The next prime is 1001201122249. The reversal of 1001201122211 is 1122211021001.

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

It is a cyclic number.

It is not a de Polignac number, because 1001201122211 - 2⁶ = 1001201122147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001201322211) 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, 8206566515 + ... + 8206566636.

It is an arithmetic number, because the mean of its divisors is an integer number (254403563856).

Almost surely, 2^{1001201122211} is an apocalyptic number.

1001201122211 is a deficient number, since it is larger than the sum of its proper divisors (16413133213).

1001201122211 is an equidigital number, since it uses as much as digits as its factorization.

1001201122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16413133212.

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

Adding to 1001201122211 its reverse (1122211021001), we get a palindrome (2123412143212).

The spelling of 1001201122211 in words is "one trillion, one billion, two hundred one million, one hundred twenty-two thousand, two hundred eleven".