21213101201121 has 12 divisors (see below), whose sum is σ = 31098476720272. Its totient is φ = 13930991833176.

The previous prime is 21213101201119. The next prime is 21213101201137. The reversal of 21213101201121 is 12110210131212.

It is a happy number.

21213101201121 is a `hidden beast` number, since 2 + 121 + 310 + 120 + 112 + 1 = 666.

It is not a de Polignac number, because 21213101201121 - 2¹ = 21213101201119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21213101201094 and 21213101201103.

It is not an unprimeable number, because it can be changed into a prime (21213101201141) 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, 17589635551 + ... + 17589636756.

Almost surely, 2^{21213101201121} is an apocalyptic number.

It is an amenable number.

21213101201121 is a deficient number, since it is larger than the sum of its proper divisors (9885375519151).

21213101201121 is a wasteful number, since it uses less digits than its factorization.

21213101201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35179272380 (or 35179272377 counting only the distinct ones).

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

Adding to 21213101201121 its reverse (12110210131212), we get a palindrome (33323311332333).

The spelling of 21213101201121 in words is "twenty-one trillion, two hundred thirteen billion, one hundred one million, two hundred one thousand, one hundred twenty-one".