21102122002099 has 4 divisors (see below), whose sum is σ = 21369237470560. Its totient is φ = 20835006533640.

The previous prime is 21102122002057. The next prime is 21102122002139. The reversal of 21102122002099 is 99020022120112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21102122002099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21102122002099.

It is not an unprimeable number, because it can be changed into a prime (21102122092099) 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, 133557734112 + ... + 133557734269.

It is an arithmetic number, because the mean of its divisors is an integer number (5342309367640).

Almost surely, 2^{21102122002099} is an apocalyptic number.

21102122002099 is a deficient number, since it is larger than the sum of its proper divisors (267115468461).

21102122002099 is an equidigital number, since it uses as much as digits as its factorization.

21102122002099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267115468460.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 21102122002099 in words is "twenty-one trillion, one hundred two billion, one hundred twenty-two million, two thousand, ninety-nine".