21220311133 has 8 divisors (see below), whose sum is σ = 24649354880. Its totient is φ = 17890660080.

The previous prime is 21220311127. The next prime is 21220311157. The reversal of 21220311133 is 33111302212.

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 21220311133 - 2¹⁷ = 21220180061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21220311133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220314133) 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, 24847713 + ... + 24848566.

It is an arithmetic number, because the mean of its divisors is an integer number (3081169360).

Almost surely, 2^21220311133 is an apocalyptic number.

It is an amenable number.

21220311133 is a deficient number, since it is larger than the sum of its proper divisors (3429043747).

21220311133 is an equidigital number, since it uses as much as digits as its factorization.

21220311133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49696347.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21220311133 its reverse (33111302212), we get a palindrome (54331613345).

The spelling of 21220311133 in words is "twenty-one billion, two hundred twenty million, three hundred eleven thousand, one hundred thirty-three".