210100211121 has 4 divisors (see below), whose sum is σ = 280133614832. Its totient is φ = 140066807412.

The previous prime is 210100211077. The next prime is 210100211129. The reversal of 210100211121 is 121112001012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 210100211121 - 2¹⁰ = 210100210097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210100211097 and 210100211106.

It is not an unprimeable number, because it can be changed into a prime (210100211129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35016701851 + ... + 35016701856.

It is an arithmetic number, because the mean of its divisors is an integer number (70033403708).

Almost surely, 2^210100211121 is an apocalyptic number.

It is an amenable number.

210100211121 is a deficient number, since it is larger than the sum of its proper divisors (70033403711).

210100211121 is an equidigital number, since it uses as much as digits as its factorization.

210100211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70033403710.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 210100211121 its reverse (121112001012), we get a palindrome (331212212133).

The spelling of 210100211121 in words is "two hundred ten billion, one hundred million, two hundred eleven thousand, one hundred twenty-one".