10212120211 has 4 divisors (see below), whose sum is σ = 10218476592.
Its totient is φ = 10205763832.
The previous prime is 10212120179. The next prime is 10212120239. The reversal of 10212120211 is 11202121201.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 10212120211 - 25 = 10212120179 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 10212120191 and 10212120200.
It is not an unprimeable number, because it can be changed into a prime (10212120311) 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, 3175780 + ... + 3178993.
It is an arithmetic number, because the mean of its divisors is an integer number (2554619148).
Almost surely, 210212120211 is an apocalyptic number.
10212120211 is a deficient number, since it is larger than the sum of its proper divisors (6356381).
10212120211 is an equidigital number, since it uses as much as digits as its factorization.
10212120211 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6356380.
The product of its (nonzero) digits is 16, while the sum is 13.
Adding to 10212120211 its reverse (11202121201), we get a palindrome (21414241412).
The spelling of 10212120211 in words is "ten billion, two hundred twelve million, one hundred twenty thousand, two hundred eleven".