221011101111112 has 64 divisors (see below), whose sum is σ = 475533440187120. Its totient is φ = 95393326399488.

The previous prime is 221011101111107. The next prime is 221011101111121. The reversal of 221011101111112 is 211111101110122.

It can be written as a sum of positive squares in 8 ways, for example, as 24051040322596 + 196960060788516 = 4904186^2 + 14034246^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397831593 + ... + 398386744.

Almost surely, 2^{221011101111112} is an apocalyptic number.

It is an amenable number.

221011101111112 is an abundant number, since it is smaller than the sum of its proper divisors (254522339076008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221011101111112 is a wasteful number, since it uses less digits than its factorization.

221011101111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796218530 (or 796218526 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 221011101111112 its reverse (211111101110122), we get a palindrome (432122202221234).

The spelling of 221011101111112 in words is "two hundred twenty-one trillion, eleven billion, one hundred one million, one hundred eleven thousand, one hundred twelve".