21441513314421 has 12 divisors (see below), whose sum is σ = 32601131355520. Its totient is φ = 13542008409000.

The previous prime is 21441513314399. The next prime is 21441513314453. The reversal of 21441513314421 is 12441331514412.

21441513314421 is a `hidden beast` number, since 2 + 1 + 44 + 151 + 33 + 14 + 421 = 666.

It is not a de Polignac number, because 21441513314421 - 2²² = 21441509120117 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 (21441513314021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62694483205 + ... + 62694483546.

Almost surely, 2^{21441513314421} is an apocalyptic number.

It is an amenable number.

21441513314421 is a deficient number, since it is larger than the sum of its proper divisors (11159618041099).

21441513314421 is a wasteful number, since it uses less digits than its factorization.

21441513314421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125388966776 (or 125388966773 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

Adding to 21441513314421 its reverse (12441331514412), we get a palindrome (33882844828833).

The spelling of 21441513314421 in words is "twenty-one trillion, four hundred forty-one billion, five hundred thirteen million, three hundred fourteen thousand, four hundred twenty-one".