21030120230 has 32 divisors (see below), whose sum is σ = 43279107840. Its totient is φ = 7207469280.

The previous prime is 21030120203. The next prime is 21030120233. The reversal of 21030120230 is 3202103012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030120233) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 122285 + ... + 238775.

It is an arithmetic number, because the mean of its divisors is an integer number (1352472120).

Almost surely, 2^21030120230 is an apocalyptic number.

21030120230 is an abundant number, since it is smaller than the sum of its proper divisors (22248987610).

21030120230 is a wasteful number, since it uses less digits than its factorization.

21030120230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119084.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21030120230 its reverse (3202103012), we get a palindrome (24232223242).

The spelling of 21030120230 in words is "twenty-one billion, thirty million, one hundred twenty thousand, two hundred thirty".