21221783311468 has 12 divisors (see below), whose sum is σ = 37142525802592. Its totient is φ = 10609633082160.

The previous prime is 21221783311409. The next prime is 21221783311513. The reversal of 21221783311468 is 86411338712212.

It is a happy number.

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, 314605455 + ... + 314672902.

Almost surely, 2^{21221783311468} is an apocalyptic number.

It is an amenable number.

21221783311468 is a deficient number, since it is larger than the sum of its proper divisors (15920742491124).

21221783311468 is a wasteful number, since it uses less digits than its factorization.

21221783311468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629286792 (or 629286790 counting only the distinct ones).

The product of its digits is 774144, while the sum is 49.

The spelling of 21221783311468 in words is "twenty-one trillion, two hundred twenty-one billion, seven hundred eighty-three million, three hundred eleven thousand, four hundred sixty-eight".