21211141121 has 16 divisors (see below), whose sum is σ = 22449208320. Its totient is φ = 19999710720.

The previous prime is 21211141109. The next prime is 21211141141. The reversal of 21211141121 is 12114111212.

It is not a de Polignac number, because 21211141121 - 2⁶ = 21211141057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21211141121.

It is not an unprimeable number, because it can be changed into a prime (21211141141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5637881 + ... + 5641641.

It is an arithmetic number, because the mean of its divisors is an integer number (1403075520).

Almost surely, 2^21211141121 is an apocalyptic number.

It is an amenable number.

21211141121 is a deficient number, since it is larger than the sum of its proper divisors (1238067199).

21211141121 is a wasteful number, since it uses less digits than its factorization.

21211141121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7216.

The product of its digits is 32, while the sum is 17.

Adding to 21211141121 its reverse (12114111212), we get a palindrome (33325252333).

The spelling of 21211141121 in words is "twenty-one billion, two hundred eleven million, one hundred forty-one thousand, one hundred twenty-one".