21113003108 has 6 divisors (see below), whose sum is σ = 36947755446. Its totient is φ = 10556501552.

The previous prime is 21113003101. The next prime is 21113003141. The reversal of 21113003108 is 80130031112.

It can be written as a sum of positive squares in only one way, i.e., 16835581504 + 4277421604 = 129752^2 + 65402^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21113003108.

It is not an unprimeable number, because it can be changed into a prime (21113003101) 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 as a sum of consecutive naturals, namely, 2639125385 + ... + 2639125392.

It is an arithmetic number, because the mean of its divisors is an integer number (6157959241).

Almost surely, 2^21113003108 is an apocalyptic number.

It is an amenable number.

21113003108 is a deficient number, since it is larger than the sum of its proper divisors (15834752338).

21113003108 is a wasteful number, since it uses less digits than its factorization.

21113003108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5278250781 (or 5278250779 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 21113003108 in words is "twenty-one billion, one hundred thirteen million, three thousand, one hundred eight".