21502445521102 has 48 divisors (see below), whose sum is σ = 41497740214560. Its totient is φ = 8276557568832.

The previous prime is 21502445521003. The next prime is 21502445521127. The reversal of 21502445521102 is 20112554420512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 228032602 + ... + 228126877.

It is an arithmetic number, because the mean of its divisors is an integer number (864536254470).

Almost surely, 2^{21502445521102} is an apocalyptic number.

21502445521102 is a deficient number, since it is larger than the sum of its proper divisors (19995294693458).

21502445521102 is a wasteful number, since it uses less digits than its factorization.

21502445521102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456159545 (or 456159538 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 34.

Adding to 21502445521102 its reverse (20112554420512), we get a palindrome (41614999941614).

The spelling of 21502445521102 in words is "twenty-one trillion, five hundred two billion, four hundred forty-five million, five hundred twenty-one thousand, one hundred two".