210111211210121 has 8 divisors (see below), whose sum is σ = 231087944244864. Its totient is φ = 189822239914320.

The previous prime is 210111211210093. The next prime is 210111211210133. The reversal of 210111211210121 is 121012112111012.

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

It is not a de Polignac number, because 210111211210121 - 2⁴² = 205713164699017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210111211210121.

It is not an unprimeable number, because it can be changed into a prime (210111211210321) 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, 171940434095 + ... + 171940435316.

It is an arithmetic number, because the mean of its divisors is an integer number (28885993030608).

Almost surely, 2^{210111211210121} is an apocalyptic number.

It is an amenable number.

210111211210121 is a deficient number, since it is larger than the sum of its proper divisors (20976733034743).

210111211210121 is a wasteful number, since it uses less digits than its factorization.

210111211210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343880869471.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 210111211210121 its reverse (121012112111012), we get a palindrome (331123323321133).

The spelling of 210111211210121 in words is "two hundred ten trillion, one hundred eleven billion, two hundred eleven million, two hundred ten thousand, one hundred twenty-one".