21220320012133 has 16 divisors (see below), whose sum is σ = 24397878435840. Its totient is φ = 18253338562800.

The previous prime is 21220320012131. The next prime is 21220320012149. The reversal of 21220320012133 is 33121002302212.

It is not a de Polignac number, because 21220320012133 - 2¹ = 21220320012131 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 (21220320012131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62427685 + ... + 62766682.

It is an arithmetic number, because the mean of its divisors is an integer number (1524867402240).

Almost surely, 2^{21220320012133} is an apocalyptic number.

It is an amenable number.

21220320012133 is a deficient number, since it is larger than the sum of its proper divisors (3177558423707).

21220320012133 is a wasteful number, since it uses less digits than its factorization.

21220320012133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125195208.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21220320012133 its reverse (33121002302212), we get a palindrome (54341322314345).

The spelling of 21220320012133 in words is "twenty-one trillion, two hundred twenty billion, three hundred twenty million, twelve thousand, one hundred thirty-three".