21002133310120 has 16 divisors (see below), whose sum is σ = 47254799947860. Its totient is φ = 8400853324032.

The previous prime is 21002133310097. The next prime is 21002133310159. The reversal of 21002133310120 is 2101333120012.

It can be written as a sum of positive squares in 2 ways, for example, as 20051964555364 + 950168754756 = 4477942^2 + 974766^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 262526666337 + ... + 262526666416.

Almost surely, 2^{21002133310120} is an apocalyptic number.

21002133310120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002133310120 is an abundant number, since it is smaller than the sum of its proper divisors (26252666637740).

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

21002133310120 is a wasteful number, since it uses less digits than its factorization.

21002133310120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525053332764 (or 525053332760 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21002133310120 its reverse (2101333120012), we get a palindrome (23103466430132).

The spelling of 21002133310120 in words is "twenty-one trillion, two billion, one hundred thirty-three million, three hundred ten thousand, one hundred twenty".