21320012233230 has 32 divisors (see below), whose sum is σ = 51168654633600. Its totient is φ = 5685267120672.

The previous prime is 21320012233229. The next prime is 21320012233243. The reversal of 21320012233230 is 3233221002312.

It is a self number, because there is not a number n which added to its sum of digits gives 21320012233230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1822300 + ... + 6779439.

It is an arithmetic number, because the mean of its divisors is an integer number (1599020457300).

Almost surely, 2^{21320012233230} is an apocalyptic number.

21320012233230 is an abundant number, since it is smaller than the sum of its proper divisors (29848642400370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21320012233230 is a wasteful number, since it uses less digits than its factorization.

21320012233230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8684368.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21320012233230 its reverse (3233221002312), we get a palindrome (24553233235542).

The spelling of 21320012233230 in words is "twenty-one trillion, three hundred twenty billion, twelve million, two hundred thirty-three thousand, two hundred thirty".