20133221021 has 8 divisors (see below), whose sum is σ = 20397146880. Its totient is φ = 19869522192.

The previous prime is 20133220997. The next prime is 20133221027. The reversal of 20133221021 is 12012233102.

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 20133221021 - 2⁶ = 20133220957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133221027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125576 + ... + 236718.

It is an arithmetic number, because the mean of its divisors is an integer number (2549643360).

Almost surely, 2^20133221021 is an apocalyptic number.

It is an amenable number.

20133221021 is a deficient number, since it is larger than the sum of its proper divisors (263925859).

20133221021 is a wasteful number, since it uses less digits than its factorization.

20133221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113515.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20133221021 its reverse (12012233102), we get a palindrome (32145454123).

The spelling of 20133221021 in words is "twenty billion, one hundred thirty-three million, two hundred twenty-one thousand, twenty-one".