21113001304 has 32 divisors (see below), whose sum is σ = 39758883840. Its totient is φ = 10510711200.

The previous prime is 21113001263. The next prime is 21113001307. The reversal of 21113001304 is 40310031112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113001307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2461327 + ... + 2469889.

It is an arithmetic number, because the mean of its divisors is an integer number (1242465120).

Almost surely, 2^21113001304 is an apocalyptic number.

It is an amenable number.

21113001304 is a deficient number, since it is larger than the sum of its proper divisors (18645882536).

21113001304 is a wasteful number, since it uses less digits than its factorization.

21113001304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9871 (or 9867 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21113001304 its reverse (40310031112), we get a palindrome (61423032416).

The spelling of 21113001304 in words is "twenty-one billion, one hundred thirteen million, one thousand, three hundred four".