21100202002 has 8 divisors (see below), whose sum is σ = 34527603312. Its totient is φ = 9591000900.

The previous prime is 21100201961. The next prime is 21100202003. The reversal of 21100202002 is 20020200112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21100202002.

It is not an unprimeable number, because it can be changed into a prime (21100202003) 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, 479550024 + ... + 479550067.

It is an arithmetic number, because the mean of its divisors is an integer number (4315950414).

Almost surely, 2^21100202002 is an apocalyptic number.

21100202002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21100202002 is a deficient number, since it is larger than the sum of its proper divisors (13427401310).

21100202002 is a wasteful number, since it uses less digits than its factorization.

21100202002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959100104.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21100202002 its reverse (20020200112), we get a palindrome (41120402114).

The spelling of 21100202002 in words is "twenty-one billion, one hundred million, two hundred two thousand, two".