21112121200102 has 8 divisors (see below), whose sum is σ = 31769358100776. Its totient is φ = 10522335166512.

The previous prime is 21112121200087. The next prime is 21112121200109. The reversal of 21112121200102 is 20100212121112.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112121200109) by changing a digit.

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, 16862715988 + ... + 16862717239.

It is an arithmetic number, because the mean of its divisors is an integer number (3971169762597).

Almost surely, 2^{21112121200102} is an apocalyptic number.

21112121200102 is a deficient number, since it is larger than the sum of its proper divisors (10657236900674).

21112121200102 is a wasteful number, since it uses less digits than its factorization.

21112121200102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33725433542.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21112121200102 its reverse (20100212121112), we get a palindrome (41212333321214).

The spelling of 21112121200102 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-one million, two hundred thousand, one hundred two".