21111102202 has 8 divisors (see below), whose sum is σ = 31670553312. Its totient is φ = 10554251100.

The previous prime is 21111102191. The next prime is 21111102203. The reversal of 21111102202 is 20220111112.

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

It is not an unprimeable number, because it can be changed into a prime (21111102203) 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, 629574 + ... + 662257.

It is an arithmetic number, because the mean of its divisors is an integer number (3958819164).

Almost surely, 2^21111102202 is an apocalyptic number.

21111102202 is a deficient number, since it is larger than the sum of its proper divisors (10559451110).

21111102202 is a wasteful number, since it uses less digits than its factorization.

21111102202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300004.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21111102202 its reverse (20220111112), we get a palindrome (41331213314).

The spelling of 21111102202 in words is "twenty-one billion, one hundred eleven million, one hundred two thousand, two hundred two".