21030243443130 has 64 divisors (see below), whose sum is σ = 51659893853568. Its totient is φ = 5476209957120.

The previous prime is 21030243443129. The next prime is 21030243443171. The reversal of 21030243443130 is 3134434203012.

It is a happy number.

It is a super-2 number, since 2×21030243443130² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 31 ways as a sum of consecutive naturals, for example, 2795812 + ... + 7062368.

It is an arithmetic number, because the mean of its divisors is an integer number (807185841462).

Almost surely, 2^{21030243443130} is an apocalyptic number.

21030243443130 is an abundant number, since it is smaller than the sum of its proper divisors (30629650410438).

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

21030243443130 is a wasteful number, since it uses less digits than its factorization.

21030243443130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4270431.

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 21030243443130 its reverse (3134434203012), we get a palindrome (24164677646142).

The spelling of 21030243443130 in words is "twenty-one trillion, thirty billion, two hundred forty-three million, four hundred forty-three thousand, one hundred thirty".