1001201232121 has 2 divisors, whose sum is σ = 1001201232122. Its totient is φ = 1001201232120.

The previous prime is 1001201232077. The next prime is 1001201232149. The reversal of 1001201232121 is 1212321021001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 975819962896 + 25381269225 = 987836^2 + 159315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001201232121 - 2¹³ = 1001201223929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001201232095 and 1001201232104.

It is not a weakly prime, because it can be changed into another prime (1001201232221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500600616060 + 500600616061.

It is an arithmetic number, because the mean of its divisors is an integer number (500600616061).

Almost surely, 2^{1001201232121} is an apocalyptic number.

It is an amenable number.

1001201232121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001201232121 is an equidigital number, since it uses as much as digits as its factorization.

1001201232121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1001201232121 its reverse (1212321021001), we get a palindrome (2213522253122).

The spelling of 1001201232121 in words is "one trillion, one billion, two hundred one million, two hundred thirty-two thousand, one hundred twenty-one".