201122121211 has 12 divisors (see below), whose sum is σ = 228691159200. Its totient is φ = 176533520240.

The previous prime is 201122121199. The next prime is 201122121217. The reversal of 201122121211 is 112121221102.

It is a de Polignac number, because none of the positive numbers 2^k-201122121211 is a prime.

It is a super-2 number, since 2×201122121211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201122121217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28654531 + ... + 28661548.

It is an arithmetic number, because the mean of its divisors is an integer number (19057596600).

Almost surely, 2^201122121211 is an apocalyptic number.

201122121211 is a deficient number, since it is larger than the sum of its proper divisors (27569037989).

201122121211 is a wasteful number, since it uses less digits than its factorization.

201122121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57316130 (or 57316119 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201122121211 its reverse (112121221102), we get a palindrome (313243342313).

The spelling of 201122121211 in words is "two hundred one billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred eleven".