201122121101 has 32 divisors (see below), whose sum is σ = 226731488256. Its totient is φ = 176853600000.

The previous prime is 201122121043. The next prime is 201122121103. The reversal of 201122121101 is 101121221102.

It is not a de Polignac number, because 201122121101 - 2¹⁸ = 201121858957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201122121103) 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, 13126421 + ... + 13141733.

It is an arithmetic number, because the mean of its divisors is an integer number (7085359008).

Almost surely, 2^201122121101 is an apocalyptic number.

It is an amenable number.

201122121101 is a deficient number, since it is larger than the sum of its proper divisors (25609367155).

201122121101 is a wasteful number, since it uses less digits than its factorization.

201122121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15713.

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

Adding to 201122121101 its reverse (101121221102), we get a palindrome (302243342203).

It can be divided in two parts, 201122 and 121101, that added together give a palindrome (322223).

The spelling of 201122121101 in words is "two hundred one billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred one".