21023210013030 has 160 divisors (see below), whose sum is σ = 58420302893568. Its totient is φ = 5421049804800.

The previous prime is 21023210013023. The next prime is 21023210013031. The reversal of 21023210013030 is 3031001232012.

21023210013030 is a `hidden beast` number, since 210 + 2 + 321 + 0 + 0 + 130 + 3 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21023210012994 and 21023210013012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023210013031) by changing a digit.

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 79 ways as a sum of consecutive naturals, for example, 951675 + ... + 6553785.

Almost surely, 2^{21023210013030} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21023210013030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29210151446784).

21023210013030 is an abundant number, since it is smaller than the sum of its proper divisors (37397092880538).

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

21023210013030 is a wasteful number, since it uses less digits than its factorization.

21023210013030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5602284 (or 5602275 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21023210013030 its reverse (3031001232012), we get a palindrome (24054211245042).

The spelling of 21023210013030 in words is "twenty-one trillion, twenty-three billion, two hundred ten million, thirteen thousand, thirty".