21011122222102 has 8 divisors (see below), whose sum is σ = 33370605882216. Its totient is φ = 9887586928032.

The previous prime is 21011122222061. The next prime is 21011122222121. The reversal of 21011122222102 is 20122222111012.

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 21011122222102.

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, 308987091468 + ... + 308987091535.

It is an arithmetic number, because the mean of its divisors is an integer number (4171325735277).

Almost surely, 2^{21011122222102} is an apocalyptic number.

21011122222102 is a deficient number, since it is larger than the sum of its proper divisors (12359483660114).

21011122222102 is a wasteful number, since it uses less digits than its factorization.

21011122222102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617974183022.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21011122222102 its reverse (20122222111012), we get a palindrome (41133344333114).

The spelling of 21011122222102 in words is "twenty-one trillion, eleven billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred two".