21443030312131 has 8 divisors (see below), whose sum is σ = 22714607672064. Its totient is φ = 20172588800640.

The previous prime is 21443030312107. The next prime is 21443030312141. The reversal of 21443030312131 is 13121303034412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21443030312131 - 2¹¹ = 21443030310083 is a prime.

It is a super-2 number, since 2×21443030312131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21443030312131.

It is not an unprimeable number, because it can be changed into a prime (21443030312141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283923235 + ... + 283998748.

It is an arithmetic number, because the mean of its divisors is an integer number (2839325959008).

Almost surely, 2^{21443030312131} is an apocalyptic number.

21443030312131 is a deficient number, since it is larger than the sum of its proper divisors (1271577359933).

21443030312131 is a wasteful number, since it uses less digits than its factorization.

21443030312131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567924221.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 21443030312131 its reverse (13121303034412), we get a palindrome (34564333346543).

The spelling of 21443030312131 in words is "twenty-one trillion, four hundred forty-three billion, thirty million, three hundred twelve thousand, one hundred thirty-one".