21214404110444 has 6 divisors (see below), whose sum is σ = 37125207193284. Its totient is φ = 10607202055220.

The previous prime is 21214404110437. The next prime is 21214404110483. The reversal of 21214404110444 is 44401140441212.

It is a super-2 number, since 2×21214404110444² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21214404110444.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2651800513802 + ... + 2651800513809.

It is an arithmetic number, because the mean of its divisors is an integer number (6187534532214).

Almost surely, 2^{21214404110444} is an apocalyptic number.

It is an amenable number.

21214404110444 is a deficient number, since it is larger than the sum of its proper divisors (15910803082840).

21214404110444 is a wasteful number, since it uses less digits than its factorization.

21214404110444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5303601027615 (or 5303601027613 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

Adding to 21214404110444 its reverse (44401140441212), we get a palindrome (65615544551656).

The spelling of 21214404110444 in words is "twenty-one trillion, two hundred fourteen billion, four hundred four million, one hundred ten thousand, four hundred forty-four".