21030132213 has 6 divisors (see below), whose sum is σ = 30376857654. Its totient is φ = 14020088136.

The previous prime is 21030132199. The next prime is 21030132229. The reversal of 21030132213 is 31223103012.

It can be written as a sum of positive squares in only one way, i.e., 18371904849 + 2658227364 = 135543^2 + 51558^2 .

It is not a de Polignac number, because 21030132213 - 2²⁴ = 21013354997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030132283) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1168340670 + ... + 1168340687.

It is an arithmetic number, because the mean of its divisors is an integer number (5062809609).

Almost surely, 2^21030132213 is an apocalyptic number.

It is an amenable number.

21030132213 is a deficient number, since it is larger than the sum of its proper divisors (9346725441).

21030132213 is a wasteful number, since it uses less digits than its factorization.

21030132213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336681363 (or 2336681360 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21030132213 its reverse (31223103012), we get a palindrome (52253235225).

The spelling of 21030132213 in words is "twenty-one billion, thirty million, one hundred thirty-two thousand, two hundred thirteen".