201121120021001 has 2 divisors, whose sum is σ = 201121120021002. Its totient is φ = 201121120021000.

The previous prime is 201121120020857. The next prime is 201121120021007. The reversal of 201121120021001 is 100120021121102.

201121120021001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115041691611001 + 86079428410000 = 10725749^2 + 9277900^2 .

It is a cyclic number.

It is not a de Polignac number, because 201121120021001 - 2³⁰ = 201120046279177 is a prime.

It is not a weakly prime, because it can be changed into another prime (201121120021007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560560010500 + 100560560010501.

It is an arithmetic number, because the mean of its divisors is an integer number (100560560010501).

Almost surely, 2^{201121120021001} is an apocalyptic number.

It is an amenable number.

201121120021001 is a deficient number, since it is larger than the sum of its proper divisors (1).

201121120021001 is an equidigital number, since it uses as much as digits as its factorization.

201121120021001 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 201121120021001 its reverse (100120021121102), we get a palindrome (301241141142103).

The spelling of 201121120021001 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred twenty million, twenty-one thousand, one".