21000110221102 has 4 divisors (see below), whose sum is σ = 31500165331656. Its totient is φ = 10500055110550.

The previous prime is 21000110221099. The next prime is 21000110221141. The reversal of 21000110221102 is 20112201100012.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250027555274 + ... + 5250027555277.

It is an arithmetic number, because the mean of its divisors is an integer number (7875041332914).

Almost surely, 2^{21000110221102} is an apocalyptic number.

21000110221102 is a deficient number, since it is larger than the sum of its proper divisors (10500055110554).

21000110221102 is a wasteful number, since it uses less digits than its factorization.

21000110221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10500055110553.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21000110221102 its reverse (20112201100012), we get a palindrome (41112311321114).

The spelling of 21000110221102 in words is "twenty-one trillion, one hundred ten million, two hundred twenty-one thousand, one hundred two".