210111122121121 has 8 divisors (see below), whose sum is σ = 227628447367104. Its totient is φ = 192787358480400.

The previous prime is 210111122121079. The next prime is 210111122121203. The reversal of 210111122121121 is 121121221111012.

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 210111122121121 - 2²⁵ = 210111088566689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210111122128121) 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, 48390399055 + ... + 48390403396.

It is an arithmetic number, because the mean of its divisors is an integer number (28453555920888).

Almost surely, 2^{210111122121121} is an apocalyptic number.

It is an amenable number.

210111122121121 is a deficient number, since it is larger than the sum of its proper divisors (17517325245983).

210111122121121 is a wasteful number, since it uses less digits than its factorization.

210111122121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96780802631.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 210111122121121 its reverse (121121221111012), we get a palindrome (331232343232133).

The spelling of 210111122121121 in words is "two hundred ten trillion, one hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".