21124203220430 has 32 divisors (see below), whose sum is σ = 38976214543200. Its totient is φ = 8238672271872.

The previous prime is 21124203220363. The next prime is 21124203220433. The reversal of 21124203220430 is 3402230242112.

It is a self number, because there is not a number n which added to its sum of digits gives 21124203220430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124203220433) 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, 42924095 + ... + 43413434.

It is an arithmetic number, because the mean of its divisors is an integer number (1218006704475).

Almost surely, 2^{21124203220430} is an apocalyptic number.

21124203220430 is a deficient number, since it is larger than the sum of its proper divisors (17852011322770).

21124203220430 is a wasteful number, since it uses less digits than its factorization.

21124203220430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86338148.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21124203220430 its reverse (3402230242112), we get a palindrome (24526433462542).

The spelling of 21124203220430 in words is "twenty-one trillion, one hundred twenty-four billion, two hundred three million, two hundred twenty thousand, four hundred thirty".