201111000210121 has 4 divisors (see below), whose sum is σ = 201111526965700. Its totient is φ = 201110473454544.

The previous prime is 201111000210089. The next prime is 201111000210161. The reversal of 201111000210121 is 121012000111102.

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 88888334219721 + 112222665990400 = 9428061^2 + 10593520^2 .

It is a cyclic number.

It is not a de Polignac number, because 201111000210121 - 2⁵ = 201111000210089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201111000210161) 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, 262804686 + ... + 263568823.

It is an arithmetic number, because the mean of its divisors is an integer number (50277881741425).

Almost surely, 2^{201111000210121} is an apocalyptic number.

It is an amenable number.

201111000210121 is a deficient number, since it is larger than the sum of its proper divisors (526755579).

201111000210121 is an equidigital number, since it uses as much as digits as its factorization.

201111000210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526755578.

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

Adding to 201111000210121 its reverse (121012000111102), we get a palindrome (322123000321223).

The spelling of 201111000210121 in words is "two hundred one trillion, one hundred eleven billion, two hundred ten thousand, one hundred twenty-one".