210011122121 has 8 divisors (see below), whose sum is σ = 210154422240. Its totient is φ = 209867876512.

The previous prime is 210011122117. The next prime is 210011122129. The reversal of 210011122121 is 121221110012.

210011122121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210011122121 - 2² = 210011122117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210011122096 and 210011122105.

It is not an unprimeable number, because it can be changed into a prime (210011122129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10050941 + ... + 10071813.

It is an arithmetic number, because the mean of its divisors is an integer number (26269302780).

Almost surely, 2^210011122121 is an apocalyptic number.

It is an amenable number.

210011122121 is a deficient number, since it is larger than the sum of its proper divisors (143300119).

210011122121 is a wasteful number, since it uses less digits than its factorization.

210011122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27255.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210011122121 its reverse (121221110012), we get a palindrome (331232232133).

The spelling of 210011122121 in words is "two hundred ten billion, eleven million, one hundred twenty-two thousand, one hundred twenty-one".