201111112200121 has 4 divisors (see below), whose sum is σ = 201111186670992. Its totient is φ = 201111037729252.

The previous prime is 201111112200071. The next prime is 201111112200127. The reversal of 201111112200121 is 121002211111102.

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 201111112200121 - 2³⁷ = 200973673246649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201111112200095 and 201111112200104.

It is not an unprimeable number, because it can be changed into a prime (201111112200127) 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, 33026011 + ... + 38638576.

It is an arithmetic number, because the mean of its divisors is an integer number (50277796667748).

Almost surely, 2^{201111112200121} is an apocalyptic number.

It is an amenable number.

201111112200121 is a deficient number, since it is larger than the sum of its proper divisors (74470871).

201111112200121 is an equidigital number, since it uses as much as digits as its factorization.

201111112200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74470870.

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

Adding to 201111112200121 its reverse (121002211111102), we get a palindrome (322113323311223).

The spelling of 201111112200121 in words is "two hundred one trillion, one hundred eleven billion, one hundred twelve million, two hundred thousand, one hundred twenty-one".