21201200000102 has 8 divisors (see below), whose sum is σ = 32129653608696. Its totient is φ = 10491315463872.

The previous prime is 21201200000089. The next prime is 21201200000129. The reversal of 21201200000102 is 20100000210212.

It is a happy number.

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54642267848 + ... + 54642268235.

It is an arithmetic number, because the mean of its divisors is an integer number (4016206701087).

Almost surely, 2^{21201200000102} is an apocalyptic number.

21201200000102 is a deficient number, since it is larger than the sum of its proper divisors (10928453608594).

21201200000102 is a wasteful number, since it uses less digits than its factorization.

21201200000102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109284536182.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21201200000102 its reverse (20100000210212), we get a palindrome (41301200210314).

The spelling of 21201200000102 in words is "twenty-one trillion, two hundred one billion, two hundred million, one hundred two", and thus it is an aban number.