21123431300130 has 16 divisors (see below), whose sum is σ = 50696235120384. Its totient is φ = 5632915013360.

The previous prime is 21123431300047. The next prime is 21123431300197. The reversal of 21123431300130 is 3100313432112.

It is a self number, because there is not a number n which added to its sum of digits gives 21123431300130.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 352057188306 + ... + 352057188365.

It is an arithmetic number, because the mean of its divisors is an integer number (3168514695024).

Almost surely, 2^{21123431300130} is an apocalyptic number.

21123431300130 is an abundant number, since it is smaller than the sum of its proper divisors (29572803820254).

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

21123431300130 is a wasteful number, since it uses less digits than its factorization.

21123431300130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704114376681.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21123431300130 its reverse (3100313432112), we get a palindrome (24223744732242).

The spelling of 21123431300130 in words is "twenty-one trillion, one hundred twenty-three billion, four hundred thirty-one million, three hundred thousand, one hundred thirty".