21513540332102 has 16 divisors (see below), whose sum is σ = 39717305228832. Its totient is φ = 8510851120320.

The previous prime is 21513540332087. The next prime is 21513540332107. The reversal of 21513540332102 is 20123304531512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21513540332107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59103132599 + ... + 59103132962.

It is an arithmetic number, because the mean of its divisors is an integer number (2482331576802).

Almost surely, 2^{21513540332102} is an apocalyptic number.

21513540332102 is a deficient number, since it is larger than the sum of its proper divisors (18203764896730).

21513540332102 is a wasteful number, since it uses less digits than its factorization.

21513540332102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118206265583.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 21513540332102 its reverse (20123304531512), we get a palindrome (41636844863614).

The spelling of 21513540332102 in words is "twenty-one trillion, five hundred thirteen billion, five hundred forty million, three hundred thirty-two thousand, one hundred two".