21113015045 has 8 divisors (see below), whose sum is σ = 25656322560. Its totient is φ = 16676609040.

The previous prime is 21113014991. The next prime is 21113015059. The reversal of 21113015045 is 54051031112.

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

It is not a de Polignac number, because 21113015045 - 2²⁶ = 21045906181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21113015045.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26724941 + ... + 26725730.

It is an arithmetic number, because the mean of its divisors is an integer number (3207040320).

Almost surely, 2^21113015045 is an apocalyptic number.

It is an amenable number.

21113015045 is a deficient number, since it is larger than the sum of its proper divisors (4543307515).

21113015045 is an equidigital number, since it uses as much as digits as its factorization.

21113015045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53450755.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 21113015045 its reverse (54051031112), we get a palindrome (75164046157).

The spelling of 21113015045 in words is "twenty-one billion, one hundred thirteen million, fifteen thousand, forty-five".