221112211012 has 48 divisors (see below), whose sum is σ = 487203212160. Its totient is φ = 85294656000.

The previous prime is 221112210997. The next prime is 221112211027. The reversal of 221112211012 is 210112211122.

It is an interprime number because it is at equal distance from previous prime (221112210997) and next prime (221112211027).

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, 3522837 + ... + 3585052.

It is an arithmetic number, because the mean of its divisors is an integer number (10150066920).

Almost surely, 2^221112211012 is an apocalyptic number.

221112211012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221112211012 is an abundant number, since it is smaller than the sum of its proper divisors (266091001148).

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

221112211012 is a wasteful number, since it uses less digits than its factorization.

221112211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7108012 (or 7108010 counting only the distinct ones).

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

Adding to 221112211012 its reverse (210112211122), we get a palindrome (431224422134).

The spelling of 221112211012 in words is "two hundred twenty-one billion, one hundred twelve million, two hundred eleven thousand, twelve".