21120344424230 has 32 divisors (see below), whose sum is σ = 38137518264960. Its totient is φ = 8421272841600.

The previous prime is 21120344424203. The next prime is 21120344424239. The reversal of 21120344424230 is 3242444302112.

It is a happy number.

It is a super-2 number, since 2×21120344424230² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120344424239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194961080 + ... + 195069380.

It is an arithmetic number, because the mean of its divisors is an integer number (1191797445780).

Almost surely, 2^{21120344424230} is an apocalyptic number.

21120344424230 is a deficient number, since it is larger than the sum of its proper divisors (17017173840730).

21120344424230 is a wasteful number, since it uses less digits than its factorization.

21120344424230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170144.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 21120344424230 its reverse (3242444302112), we get a palindrome (24362788726342).

The spelling of 21120344424230 in words is "twenty-one trillion, one hundred twenty billion, three hundred forty-four million, four hundred twenty-four thousand, two hundred thirty".