221111212102 has 8 divisors (see below), whose sum is σ = 361818347112. Its totient is φ = 100505096400.

The previous prime is 221111212099. The next prime is 221111212129. The reversal of 221111212102 is 201212111122.

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, 5025254799 + ... + 5025254842.

It is an arithmetic number, because the mean of its divisors is an integer number (45227293389).

Almost surely, 2^221111212102 is an apocalyptic number.

221111212102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221111212102 is a deficient number, since it is larger than the sum of its proper divisors (140707135010).

221111212102 is a wasteful number, since it uses less digits than its factorization.

221111212102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10050509654.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221111212102 its reverse (201212111122), we get a palindrome (422323323224).

The spelling of 221111212102 in words is "two hundred twenty-one billion, one hundred eleven million, two hundred twelve thousand, one hundred two".