21030013120000 has 400 divisors, whose sum is σ = 54276611824512. Its totient is φ = 8129249280000.

The previous prime is 21030013119989. The next prime is 21030013120027. The reversal of 21030013120000 is 2131003012.

It is a tau number, because it is divible by the number of its divisors (400).

It is a super-2 number, since 2×21030013120000² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11834559112 + ... + 11834560888.

Almost surely, 2^{21030013120000} is an apocalyptic number.

21030013120000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21030013120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27138305912256).

21030013120000 is an abundant number, since it is smaller than the sum of its proper divisors (33246598704512).

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

21030013120000 is an equidigital number, since it uses as much as digits as its factorization.

21030013120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039 (or 3008 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21030013120000 its reverse (2131003012), we get a palindrome (21032144123012).

The spelling of 21030013120000 in words is "twenty-one trillion, thirty billion, thirteen million, one hundred twenty thousand".