21202111111102 has 8 divisors (see below), whose sum is σ = 33185913043536. Its totient is φ = 10140140096592.

The previous prime is 21202111111099. The next prime is 21202111111133. The reversal of 21202111111102 is 20111111120212.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230457729423 + ... + 230457729514.

It is an arithmetic number, because the mean of its divisors is an integer number (4148239130442).

Almost surely, 2^{21202111111102} is an apocalyptic number.

21202111111102 is a deficient number, since it is larger than the sum of its proper divisors (11983801932434).

21202111111102 is a wasteful number, since it uses less digits than its factorization.

21202111111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460915458962.

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

Adding to 21202111111102 its reverse (20111111120212), we get a palindrome (41313222231314).

The spelling of 21202111111102 in words is "twenty-one trillion, two hundred two billion, one hundred eleven million, one hundred eleven thousand, one hundred two".