21033023002221 has 8 divisors (see below), whose sum is σ = 29011066210080. Its totient is φ = 13538497564592.

The previous prime is 21033023002219. The next prime is 21033023002249. The reversal of 21033023002221 is 12220032033012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21033023002221 - 2¹ = 21033023002219 is a prime.

It is a super-2 number, since 2×21033023002221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033023002921) 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, 120879442455 + ... + 120879442628.

It is an arithmetic number, because the mean of its divisors is an integer number (3626383276260).

Almost surely, 2^{21033023002221} is an apocalyptic number.

It is an amenable number.

21033023002221 is a deficient number, since it is larger than the sum of its proper divisors (7978043207859).

21033023002221 is a wasteful number, since it uses less digits than its factorization.

21033023002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241758885115.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21033023002221 its reverse (12220032033012), we get a palindrome (33253055035233).

The spelling of 21033023002221 in words is "twenty-one trillion, thirty-three billion, twenty-three million, two thousand, two hundred twenty-one".