201121102102001 has 4 divisors (see below), whose sum is σ = 203000738570352. Its totient is φ = 199241465633652.

The previous prime is 201121102101967. The next prime is 201121102102013. The reversal of 201121102102001 is 100201201121102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201121102102001 - 2³⁴ = 201103922232817 is a prime.

It is a super-2 number, since 2×201121102102001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201121102102021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 939818234015 + ... + 939818234228.

It is an arithmetic number, because the mean of its divisors is an integer number (50750184642588).

Almost surely, 2^{201121102102001} is an apocalyptic number.

It is an amenable number.

201121102102001 is a deficient number, since it is larger than the sum of its proper divisors (1879636468351).

201121102102001 is a wasteful number, since it uses less digits than its factorization.

201121102102001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879636468350.

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

Adding to 201121102102001 its reverse (100201201121102), we get a palindrome (301322303223103).

The spelling of 201121102102001 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred two million, one hundred two thousand, one".