21322212021013 has 4 divisors (see below), whose sum is σ = 21389474519820. Its totient is φ = 21254949522208.

The previous prime is 21322212021007. The next prime is 21322212021029. The reversal of 21322212021013 is 31012021222312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 745255811524 + 20576956209489 = 863282^2 + 4536183^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21322212021013 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 (21322212021073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33631248928 + ... + 33631249561.

It is an arithmetic number, because the mean of its divisors is an integer number (5347368629955).

Almost surely, 2^{21322212021013} is an apocalyptic number.

It is an amenable number.

21322212021013 is a deficient number, since it is larger than the sum of its proper divisors (67262498807).

21322212021013 is an equidigital number, since it uses as much as digits as its factorization.

21322212021013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67262498806.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21322212021013 its reverse (31012021222312), we get a palindrome (52334233243325).

The spelling of 21322212021013 in words is "twenty-one trillion, three hundred twenty-two billion, two hundred twelve million, twenty-one thousand, thirteen".