201111010002121 has 4 divisors (see below), whose sum is σ = 201945495521044. Its totient is φ = 200276524483200.

The previous prime is 201111010002061. The next prime is 201111010002239. The reversal of 201111010002121 is 121200010111102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83411597670025 + 117699412332096 = 9132995^2 + 10848936^2 .

It is a cyclic number.

It is not a de Polignac number, because 201111010002121 - 2²³ = 201111001613513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201111010003121) 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, 417242759100 + ... + 417242759581.

It is an arithmetic number, because the mean of its divisors is an integer number (50486373880261).

Almost surely, 2^{201111010002121} is an apocalyptic number.

It is an amenable number.

201111010002121 is a deficient number, since it is larger than the sum of its proper divisors (834485518923).

201111010002121 is an equidigital number, since it uses as much as digits as its factorization.

201111010002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834485518922.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201111010002121 its reverse (121200010111102), we get a palindrome (322311020113223).

The spelling of 201111010002121 in words is "two hundred one trillion, one hundred eleven billion, ten million, two thousand, one hundred twenty-one".