210111012111001 has 4 divisors (see below), whose sum is σ = 210165150484404. Its totient is φ = 210056873737600.

The previous prime is 210111012110939. The next prime is 210111012111047. The reversal of 210111012111001 is 100111210111012.

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 79574446043401 + 130536566067600 = 8920451^2 + 11425260^2 .

It is a cyclic number.

It is not a de Polignac number, because 210111012111001 - 2³⁵ = 210076652372633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210111012111601) 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, 27069180880 + ... + 27069188641.

It is an arithmetic number, because the mean of its divisors is an integer number (52541287621101).

Almost surely, 2^{210111012111001} is an apocalyptic number.

It is an amenable number.

210111012111001 is a deficient number, since it is larger than the sum of its proper divisors (54138373403).

210111012111001 is an equidigital number, since it uses as much as digits as its factorization.

210111012111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54138373402.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 210111012111001 its reverse (100111210111012), we get a palindrome (310222222222013).

The spelling of 210111012111001 in words is "two hundred ten trillion, one hundred eleven billion, twelve million, one hundred eleven thousand, one".