201211011221011 has 32 divisors (see below), whose sum is σ = 229352555980800. Its totient is φ = 174838263600000.

The previous prime is 201211011221009. The next prime is 201211011221023. The reversal of 201211011221011 is 110122110112102.

It is not a de Polignac number, because 201211011221011 - 2¹ = 201211011221009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201211011921011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229961410 + ... + 230834728.

It is an arithmetic number, because the mean of its divisors is an integer number (7167267374400).

Almost surely, 2^{201211011221011} is an apocalyptic number.

201211011221011 is a deficient number, since it is larger than the sum of its proper divisors (28141544759789).

201211011221011 is a wasteful number, since it uses less digits than its factorization.

201211011221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880611.

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

Adding to 201211011221011 its reverse (110122110112102), we get a palindrome (311333121333113).

The spelling of 201211011221011 in words is "two hundred one trillion, two hundred eleven billion, eleven million, two hundred twenty-one thousand, eleven".