21133220712370 has 16 divisors (see below), whose sum is σ = 40965935535000. Its totient is φ = 7803035339904.

The previous prime is 21133220712349. The next prime is 21133220712371. The reversal of 21133220712370 is 7321702233112.

It can be written as a sum of positive squares in 4 ways, for example, as 16825657444281 + 4307563268089 = 4101909^2 + 2075467^2 .

It is a super-2 number, since 2×21133220712370² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21133220712371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81281617995 + ... + 81281618254.

Almost surely, 2^{21133220712370} is an apocalyptic number.

21133220712370 is a deficient number, since it is larger than the sum of its proper divisors (19832714822630).

21133220712370 is a wasteful number, since it uses less digits than its factorization.

21133220712370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162563236269.

The product of its (nonzero) digits is 21168, while the sum is 34.

Adding to 21133220712370 its reverse (7321702233112), we get a palindrome (28454922945482).

The spelling of 21133220712370 in words is "twenty-one trillion, one hundred thirty-three billion, two hundred twenty million, seven hundred twelve thousand, three hundred seventy".