21001102011102 has 8 divisors (see below), whose sum is σ = 42002204022216. Its totient is φ = 7000367337032.

The previous prime is 21001102011083. The next prime is 21001102011107. The reversal of 21001102011102 is 20111020110012.

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

21001102011102 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001102011107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1750091834253 + ... + 1750091834264.

It is an arithmetic number, because the mean of its divisors is an integer number (5250275502777).

Almost surely, 2^{21001102011102} is an apocalyptic number.

21001102011102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21001102011102 is a wasteful number, since it uses less digits than its factorization.

21001102011102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500183668522.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21001102011102 its reverse (20111020110012), we get a palindrome (41112122121114).

The spelling of 21001102011102 in words is "twenty-one trillion, one billion, one hundred two million, eleven thousand, one hundred two".