210000011121 has 24 divisors (see below), whose sum is σ = 309815126400. Its totient is φ = 137008954656.

The previous prime is 210000011119. The next prime is 210000011171. The reversal of 210000011121 is 121110000012.

It is a happy number.

It is not a de Polignac number, because 210000011121 - 2¹ = 210000011119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (210000011171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8775030 + ... + 8798928.

It is an arithmetic number, because the mean of its divisors is an integer number (12908963600).

Almost surely, 2^210000011121 is an apocalyptic number.

It is an amenable number.

210000011121 is a deficient number, since it is larger than the sum of its proper divisors (99815115279).

210000011121 is a wasteful number, since it uses less digits than its factorization.

210000011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44725 (or 44722 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 210000011121 its reverse (121110000012), we get a palindrome (331110011133).

The spelling of 210000011121 in words is "two hundred ten billion, eleven thousand, one hundred twenty-one".