10211121211 has 4 divisors (see below), whose sum is σ = 10325853000. Its totient is φ = 10096389424.

The previous prime is 10211121187. The next prime is 10211121259. The reversal of 10211121211 is 11212111201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10211121211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10211121191 and 10211121200.

It is not an unprimeable number, because it can be changed into a prime (10211122211) 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, 57365761 + ... + 57365938.

It is an arithmetic number, because the mean of its divisors is an integer number (2581463250).

Almost surely, 2^10211121211 is an apocalyptic number.

10211121211 is a deficient number, since it is larger than the sum of its proper divisors (114731789).

10211121211 is an equidigital number, since it uses as much as digits as its factorization.

10211121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114731788.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10211121211 its reverse (11212111201), we get a palindrome (21423232412).

The spelling of 10211121211 in words is "ten billion, two hundred eleven million, one hundred twenty-one thousand, two hundred eleven".