21221533623316 has 24 divisors (see below), whose sum is σ = 40075883848224. Its totient is φ = 9774605793120.

The previous prime is 21221533623313. The next prime is 21221533623349. The reversal of 21221533623316 is 61332633512212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221533623313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415561450 + ... + 415612513.

It is an arithmetic number, because the mean of its divisors is an integer number (1669828493676).

Almost surely, 2^{21221533623316} is an apocalyptic number.

21221533623316 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21221533623316 is a deficient number, since it is larger than the sum of its proper divisors (18854350224908).

21221533623316 is a wasteful number, since it uses less digits than its factorization.

21221533623316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831174471 (or 831174469 counting only the distinct ones).

The product of its digits is 233280, while the sum is 40.

The spelling of 21221533623316 in words is "twenty-one trillion, two hundred twenty-one billion, five hundred thirty-three million, six hundred twenty-three thousand, three hundred sixteen".