201122011121 has 2 divisors, whose sum is σ = 201122011122. Its totient is φ = 201122011120.

The previous prime is 201122011117. The next prime is 201122011151. The reversal of 201122011121 is 121110221102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198480051121 + 2641960000 = 445511^2 + 51400^2 .

It is a cyclic number.

It is not a de Polignac number, because 201122011121 - 2² = 201122011117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201122011096 and 201122011105.

It is not a weakly prime, because it can be changed into another prime (201122011151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100561005560 + 100561005561.

It is an arithmetic number, because the mean of its divisors is an integer number (100561005561).

Almost surely, 2^201122011121 is an apocalyptic number.

It is an amenable number.

201122011121 is a deficient number, since it is larger than the sum of its proper divisors (1).

201122011121 is an equidigital number, since it uses as much as digits as its factorization.

201122011121 is an evil number, because the sum of its binary digits is even.

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

Adding to 201122011121 its reverse (121110221102), we get a palindrome (322232232223).

The spelling of 201122011121 in words is "two hundred one billion, one hundred twenty-two million, eleven thousand, one hundred twenty-one".