21113130412 has 48 divisors (see below), whose sum is σ = 41662333440. Its totient is φ = 9279489600.

The previous prime is 21113130373. The next prime is 21113130421. The reversal of 21113130412 is 21403131112.

It is a self number, because there is not a number n which added to its sum of digits gives 21113130412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91693 + ... + 225019.

It is an arithmetic number, because the mean of its divisors is an integer number (867965280).

Almost surely, 2^21113130412 is an apocalyptic number.

21113130412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21113130412 is a deficient number, since it is larger than the sum of its proper divisors (20549203028).

21113130412 is a wasteful number, since it uses less digits than its factorization.

21113130412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133462 (or 133460 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21113130412 its reverse (21403131112), we get a palindrome (42516261524).

It can be divided in two parts, 21113 and 130412, that added together give a triangular number (151525 = T₅₅₀).

The spelling of 21113130412 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty thousand, four hundred twelve".