21113152502 has 32 divisors (see below), whose sum is σ = 34686289344. Its totient is φ = 9580032000.

The previous prime is 21113152471. The next prime is 21113152531. The reversal of 21113152502 is 20525131112.

21113152502 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 353102 + ... + 408542.

It is an arithmetic number, because the mean of its divisors is an integer number (1083946542).

Almost surely, 2^21113152502 is an apocalyptic number.

21113152502 is a deficient number, since it is larger than the sum of its proper divisors (13573136842).

21113152502 is a wasteful number, since it uses less digits than its factorization.

21113152502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55704.

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

Adding to 21113152502 its reverse (20525131112), we get a palindrome (41638283614).

The spelling of 21113152502 in words is "twenty-one billion, one hundred thirteen million, one hundred fifty-two thousand, five hundred two".