21211000130121 has 16 divisors (see below), whose sum is σ = 28542419452800. Its totient is φ = 14010138546048.

The previous prime is 21211000130093. The next prime is 21211000130129. The reversal of 21211000130121 is 12103100011212.

It is not a de Polignac number, because 21211000130121 - 2⁷ = 21211000129993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21211000130121.

It is not an unprimeable number, because it can be changed into a prime (21211000130129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3937020 + ... + 7610658.

It is an arithmetic number, because the mean of its divisors is an integer number (1783901215800).

Almost surely, 2^{21211000130121} is an apocalyptic number.

It is an amenable number.

21211000130121 is a deficient number, since it is larger than the sum of its proper divisors (7331419322679).

21211000130121 is a wasteful number, since it uses less digits than its factorization.

21211000130121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691408.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21211000130121 its reverse (12103100011212), we get a palindrome (33314100141333).

The spelling of 21211000130121 in words is "twenty-one trillion, two hundred eleven billion, one hundred thirty thousand, one hundred twenty-one".