21033431102221 has 8 divisors (see below), whose sum is σ = 21857646528000. Its totient is φ = 20218323029520.

The previous prime is 21033431102209. The next prime is 21033431102273. The reversal of 21033431102221 is 12220113433012.

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-21033431102221 is a prime.

It is a super-2 number, since 2×21033431102221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033431102521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2276833561 + ... + 2276842798.

It is an arithmetic number, because the mean of its divisors is an integer number (2732205816000).

Almost surely, 2^{21033431102221} is an apocalyptic number.

It is an amenable number.

21033431102221 is a deficient number, since it is larger than the sum of its proper divisors (824215425779).

21033431102221 is a wasteful number, since it uses less digits than its factorization.

21033431102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4553676539.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21033431102221 its reverse (12220113433012), we get a palindrome (33253544535233).

The spelling of 21033431102221 in words is "twenty-one trillion, thirty-three billion, four hundred thirty-one million, one hundred two thousand, two hundred twenty-one".