211310121 has 16 divisors (see below), whose sum is σ = 308288448. Its totient is φ = 127680000.

The previous prime is 211310111. The next prime is 211310149. The reversal of 211310121 is 121013112.

It is not a de Polignac number, because 211310121 - 2⁵ = 211310089 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211310097 and 211310106.

It is not an unprimeable number, because it can be changed into a prime (211310101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1621 + ... + 20621.

It is an arithmetic number, because the mean of its divisors is an integer number (19268028).

Almost surely, 2^211310121 is an apocalyptic number.

It is an amenable number.

211310121 is a deficient number, since it is larger than the sum of its proper divisors (96978327).

211310121 is a wasteful number, since it uses less digits than its factorization.

211310121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19352.

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

The square root of 211310121 is about 14536.5099318922. The cubic root of 211310121 is about 595.6257062004.

Adding to 211310121 its reverse (121013112), we get a palindrome (332323233).

The spelling of 211310121 in words is "two hundred eleven million, three hundred ten thousand, one hundred twenty-one".