21211201033321 has 8 divisors (see below), whose sum is σ = 22852441857224. Its totient is φ = 19571333063040.

The previous prime is 21211201033291. The next prime is 21211201033327. The reversal of 21211201033321 is 12333010211212.

It can be written as a sum of positive squares in 4 ways, for example, as 170044893225 + 21041156140096 = 412365^2 + 4587064^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21211201033321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21211201033292 and 21211201033301.

It is not an unprimeable number, because it can be changed into a prime (21211201033327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343181310 + ... + 343243111.

It is an arithmetic number, because the mean of its divisors is an integer number (2856555232153).

Almost surely, 2^{21211201033321} is an apocalyptic number.

It is an amenable number.

21211201033321 is a deficient number, since it is larger than the sum of its proper divisors (1641240823903).

21211201033321 is a wasteful number, since it uses less digits than its factorization.

21211201033321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686426811.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21211201033321 its reverse (12333010211212), we get a palindrome (33544211244533).

The spelling of 21211201033321 in words is "twenty-one trillion, two hundred eleven billion, two hundred one million, thirty-three thousand, three hundred twenty-one".