210011111121 has 8 divisors (see below), whose sum is σ = 320016931264. Its totient is φ = 120006349200.

The previous prime is 210011111099. The next prime is 210011111179. The reversal of 210011111121 is 121111110012.

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

It is not a de Polignac number, because 210011111121 - 2¹⁴ = 210011094737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210011111097 and 210011111106.

It is not an unprimeable number, because it can be changed into a prime (210011111621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5000264530 + ... + 5000264571.

It is an arithmetic number, because the mean of its divisors is an integer number (40002116408).

Almost surely, 2^210011111121 is an apocalyptic number.

210011111121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210011111121 is a deficient number, since it is larger than the sum of its proper divisors (110005820143).

210011111121 is a wasteful number, since it uses less digits than its factorization.

210011111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000529111.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 210011111121 its reverse (121111110012), we get a palindrome (331122221133).

The spelling of 210011111121 in words is "two hundred ten billion, eleven million, one hundred eleven thousand, one hundred twenty-one".