21002110013120 has 28 divisors (see below), whose sum is σ = 50011274469504. Its totient is φ = 8400844005120.

The previous prime is 21002110013107. The next prime is 21002110013147. The reversal of 21002110013120 is 2131001120012.

It is a junction number, because it is equal to n+sod(n) for n = 21002110013095 and 21002110013104.

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 3 ways as a sum of consecutive naturals, for example, 32815796576 + ... + 32815797215.

Almost surely, 2^{21002110013120} is an apocalyptic number.

21002110013120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002110013120 is an abundant number, since it is smaller than the sum of its proper divisors (29009164456384).

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

21002110013120 is an equidigital number, since it uses as much as digits as its factorization.

21002110013120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65631593808 (or 65631593798 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21002110013120 its reverse (2131001120012), we get a palindrome (23133111133132).

The spelling of 21002110013120 in words is "twenty-one trillion, two billion, one hundred ten million, thirteen thousand, one hundred twenty".