210111210221121 has 12 divisors (see below), whose sum is σ = 331084331257680. Its totient is φ = 127340127406680.

The previous prime is 210111210221117. The next prime is 210111210221167. The reversal of 210111210221121 is 121122012111012.

It is a happy number.

210111210221121 is a `hidden beast` number, since 2 + 1 + 0 + 111 + 210 + 221 + 121 = 666.

It is not a de Polignac number, because 210111210221121 - 2² = 210111210221117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210111210221094 and 210111210221103.

It is not an unprimeable number, because it can be changed into a prime (210111210221821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1061167728291 + ... + 1061167728488.

It is an arithmetic number, because the mean of its divisors is an integer number (27590360938140).

Almost surely, 2^{210111210221121} is an apocalyptic number.

It is an amenable number.

210111210221121 is a deficient number, since it is larger than the sum of its proper divisors (120973121036559).

210111210221121 is a wasteful number, since it uses less digits than its factorization.

210111210221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122335456796 (or 2122335456793 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 210111210221121 its reverse (121122012111012), we get a palindrome (331233222332133).

The spelling of 210111210221121 in words is "two hundred ten trillion, one hundred eleven billion, two hundred ten million, two hundred twenty-one thousand, one hundred twenty-one".