201121001112101 has 4 divisors (see below), whose sum is σ = 229852572699552. Its totient is φ = 172389429524652.

The previous prime is 201121001112011. The next prime is 201121001112259. The reversal of 201121001112101 is 101211100121102.

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 201121001112101 - 2³⁰ = 201119927370277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121004112101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14365785793715 + ... + 14365785793728.

It is an arithmetic number, because the mean of its divisors is an integer number (57463143174888).

Almost surely, 2^{201121001112101} is an apocalyptic number.

It is an amenable number.

201121001112101 is a deficient number, since it is larger than the sum of its proper divisors (28731571587451).

201121001112101 is an equidigital number, since it uses as much as digits as its factorization.

201121001112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28731571587450.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 201121001112101 its reverse (101211100121102), we get a palindrome (302332101233203).

Subtracting from 201121001112101 its reverse (101211100121102), we obtain a palindrome (99909900990999).

The spelling of 201121001112101 in words is "two hundred one trillion, one hundred twenty-one billion, one million, one hundred twelve thousand, one hundred one".