20211310211121 has 12 divisors (see below), whose sum is σ = 29212840949760. Its totient is φ = 13465563945720.

The previous prime is 20211310211077. The next prime is 20211310211137. The reversal of 20211310211121 is 12111201311202.

It is a happy number.

20211310211121 is a `hidden beast` number, since 2 + 0 + 21 + 1 + 310 + 211 + 121 = 666.

It is not a de Polignac number, because 20211310211121 - 2¹⁰ = 20211310210097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20211310211094 and 20211310211103.

It is not an unprimeable number, because it can be changed into a prime (20211310210121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 720223665 + ... + 720251726.

It is an arithmetic number, because the mean of its divisors is an integer number (2434403412480).

Almost surely, 2^{20211310211121} is an apocalyptic number.

It is an amenable number.

20211310211121 is a deficient number, since it is larger than the sum of its proper divisors (9001530738639).

20211310211121 is a wasteful number, since it uses less digits than its factorization.

20211310211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440476956 (or 1440476953 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 20211310211121 its reverse (12111201311202), we get a palindrome (32322511522323).

The spelling of 20211310211121 in words is "twenty trillion, two hundred eleven billion, three hundred ten million, two hundred eleven thousand, one hundred twenty-one".