21320012323120 has 40 divisors (see below), whose sum is σ = 56650318460064. Its totient is φ = 7309718510592.

The previous prime is 21320012323111. The next prime is 21320012323147. The reversal of 21320012323120 is 2132321002312.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×21320012323120³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21320012323091 and 21320012323100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19035724729 + ... + 19035725848.

Almost surely, 2^{21320012323120} is an apocalyptic number.

21320012323120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21320012323120 is an abundant number, since it is smaller than the sum of its proper divisors (35330306136944).

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

21320012323120 is a wasteful number, since it uses less digits than its factorization.

21320012323120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38071450597 (or 38071450591 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21320012323120 its reverse (2132321002312), we get a palindrome (23452333325432).

The spelling of 21320012323120 in words is "twenty-one trillion, three hundred twenty billion, twelve million, three hundred twenty-three thousand, one hundred twenty".