21113131430 has 8 divisors (see below), whose sum is σ = 38003636592. Its totient is φ = 8445252568.

The previous prime is 21113131421. The next prime is 21113131439. The reversal of 21113131430 is 3413131112.

It is an interprime number because it is at equal distance from previous prime (21113131421) and next prime (21113131439).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113131439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055656562 + ... + 1055656581.

It is an arithmetic number, because the mean of its divisors is an integer number (4750454574).

Almost surely, 2^21113131430 is an apocalyptic number.

21113131430 is a deficient number, since it is larger than the sum of its proper divisors (16890505162).

21113131430 is a wasteful number, since it uses less digits than its factorization.

21113131430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111313150.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21113131430 its reverse (3413131112), we get a palindrome (24526262542).

The spelling of 21113131430 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty-one thousand, four hundred thirty".