21441441213 has 6 divisors (see below), whose sum is σ = 30970970654. Its totient is φ = 14294294136.

The previous prime is 21441441209. The next prime is 21441441223. The reversal of 21441441213 is 31214414412.

21441441213 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 1 + 441 + 213 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13633598169 + 7807843044 = 116763^2 + 88362^2 .

It is not a de Polignac number, because 21441441213 - 2² = 21441441209 is a prime.

It is a super-2 number, since 2×21441441213² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441441223) 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, 1191191170 + ... + 1191191187.

Almost surely, 2^21441441213 is an apocalyptic number.

It is an amenable number.

21441441213 is a deficient number, since it is larger than the sum of its proper divisors (9529529441).

21441441213 is a wasteful number, since it uses less digits than its factorization.

21441441213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382382363 (or 2382382360 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 21441441213 its reverse (31214414412), we get a palindrome (52655855625).

The spelling of 21441441213 in words is "twenty-one billion, four hundred forty-one million, four hundred forty-one thousand, two hundred thirteen".