21256020611102 has 8 divisors (see below), whose sum is σ = 31897697460696. Its totient is φ = 10623454790872.

The previous prime is 21256020611087. The next prime is 21256020611113. The reversal of 21256020611102 is 20111602065212.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2277751508 + ... + 2277760839.

It is an arithmetic number, because the mean of its divisors is an integer number (3987212182587).

Almost surely, 2^{21256020611102} is an apocalyptic number.

21256020611102 is a deficient number, since it is larger than the sum of its proper divisors (10641676849594).

21256020611102 is a wasteful number, since it uses less digits than its factorization.

21256020611102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4555514682.

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 21256020611102 its reverse (20111602065212), we get a palindrome (41367622676314).

The spelling of 21256020611102 in words is "twenty-one trillion, two hundred fifty-six billion, twenty million, six hundred eleven thousand, one hundred two".