201000210121111 has 4 divisors (see below), whose sum is σ = 201029860549800. Its totient is φ = 200970559692424.

The previous prime is 201000210121043. The next prime is 201000210121129. The reversal of 201000210121111 is 111121012000102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 201000210121111 - 2⁹ = 201000210120599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201000210121091 and 201000210121100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201000210101111) 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, 14825204176 + ... + 14825217733.

It is an arithmetic number, because the mean of its divisors is an integer number (50257465137450).

Almost surely, 2^{201000210121111} is an apocalyptic number.

201000210121111 is a deficient number, since it is larger than the sum of its proper divisors (29650428689).

201000210121111 is an equidigital number, since it uses as much as digits as its factorization.

201000210121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29650428688.

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

Adding to 201000210121111 its reverse (111121012000102), we get a palindrome (312121222121213).

The spelling of 201000210121111 in words is "two hundred one trillion, two hundred ten million, one hundred twenty-one thousand, one hundred eleven".