201121100221231 has 2 divisors, whose sum is σ = 201121100221232. Its totient is φ = 201121100221230.

The previous prime is 201121100221133. The next prime is 201121100221289. The reversal of 201121100221231 is 132122001121102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201121100221231 - 2⁷ = 201121100221103 is a prime.

It is a super-2 number, since 2×201121100221231² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201121100221199 and 201121100221208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201121100221291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560550110615 + 100560550110616.

It is an arithmetic number, because the mean of its divisors is an integer number (100560550110616).

Almost surely, 2^{201121100221231} is an apocalyptic number.

201121100221231 is a deficient number, since it is larger than the sum of its proper divisors (1).

201121100221231 is an equidigital number, since it uses as much as digits as its factorization.

201121100221231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 201121100221231 its reverse (132122001121102), we get a palindrome (333243101342333).

The spelling of 201121100221231 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred million, two hundred twenty-one thousand, two hundred thirty-one".