21321130221232 has 20 divisors (see below), whose sum is σ = 42426167907616. Its totient is φ = 10372441728960.

The previous prime is 21321130221217. The next prime is 21321130221247. The reversal of 21321130221232 is 23212203112312.

It is an interprime number because it is at equal distance from previous prime (21321130221217) and next prime (21321130221247).

It is a junction number, because it is equal to n+sod(n) for n = 21321130221197 and 21321130221206.

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, 18007710744 + ... + 18007711927.

Almost surely, 2^{21321130221232} is an apocalyptic number.

It is an amenable number.

21321130221232 is a deficient number, since it is larger than the sum of its proper divisors (21105037686384).

21321130221232 is a wasteful number, since it uses less digits than its factorization.

21321130221232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36015422716 (or 36015422710 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21321130221232 its reverse (23212203112312), we get a palindrome (44533333333544).

The spelling of 21321130221232 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred thirty million, two hundred twenty-one thousand, two hundred thirty-two".