21321102102110 has 16 divisors (see below), whose sum is σ = 39270495035376. Its totient is φ = 8330105007168.

The previous prime is 21321102102073. The next prime is 21321102102137. The reversal of 21321102102110 is 1120120112312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24791978759 + ... + 24791979618.

It is an arithmetic number, because the mean of its divisors is an integer number (2454405939711).

Almost surely, 2^{21321102102110} is an apocalyptic number.

21321102102110 is a deficient number, since it is larger than the sum of its proper divisors (17949392933266).

21321102102110 is a wasteful number, since it uses less digits than its factorization.

21321102102110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49583958427.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21321102102110 its reverse (1120120112312), we get a palindrome (22441222214422).

The spelling of 21321102102110 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred two million, one hundred two thousand, one hundred ten".