201220122011 has 4 divisors (see below), whose sum is σ = 209968822992. Its totient is φ = 192471421032.

The previous prime is 201220122007. The next prime is 201220122029. The reversal of 201220122011 is 110221022102.

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 201220122011 - 2² = 201220122007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201220122091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4374350456 + ... + 4374350501.

It is an arithmetic number, because the mean of its divisors is an integer number (52492205748).

Almost surely, 2^201220122011 is an apocalyptic number.

201220122011 is a deficient number, since it is larger than the sum of its proper divisors (8748700981).

201220122011 is an equidigital number, since it uses as much as digits as its factorization.

201220122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8748700980.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201220122011 its reverse (110221022102), we get a palindrome (311441144113).

Subtracting from 201220122011 its reverse (110221022102), we obtain a palindrome (90999099909).

The spelling of 201220122011 in words is "two hundred one billion, two hundred twenty million, one hundred twenty-two thousand, eleven".