21001304113444 has 12 divisors (see below), whose sum is σ = 36752728868464. Its totient is φ = 10500524436744.

The previous prime is 21001304113429. The next prime is 21001304113463. The reversal of 21001304113444 is 44431140310012.

It is a super-2 number, since 2×21001304113444² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31534254 + ... + 32193349.

Almost surely, 2^{21001304113444} is an apocalyptic number.

It is an amenable number.

21001304113444 is a deficient number, since it is larger than the sum of its proper divisors (15751424755020).

21001304113444 is a wasteful number, since it uses less digits than its factorization.

21001304113444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63809994 (or 63809992 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21001304113444 its reverse (44431140310012), we get a palindrome (65432444423456).

The spelling of 21001304113444 in words is "twenty-one trillion, one billion, three hundred four million, one hundred thirteen thousand, four hundred forty-four".