210111122102001 has 4 divisors (see below), whose sum is σ = 280148162802672. Its totient is φ = 140074081401332.

The previous prime is 210111122101901. The next prime is 210111122102023. The reversal of 210111122102001 is 100201221111012.

It is a happy number.

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 210111122102001 - 2⁴⁶ = 139742377924337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210111122102071) 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, 35018520350331 + ... + 35018520350336.

It is an arithmetic number, because the mean of its divisors is an integer number (70037040700668).

Almost surely, 2^{210111122102001} is an apocalyptic number.

It is an amenable number.

210111122102001 is a deficient number, since it is larger than the sum of its proper divisors (70037040700671).

210111122102001 is an equidigital number, since it uses as much as digits as its factorization.

210111122102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70037040700670.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210111122102001 its reverse (100201221111012), we get a palindrome (310312343213013).

The spelling of 210111122102001 in words is "two hundred ten trillion, one hundred eleven billion, one hundred twenty-two million, one hundred two thousand, one".