221211102112 has 144 divisors (see below), whose sum is σ = 595182222432. Its totient is φ = 79556359680.

The previous prime is 221211102061. The next prime is 221211102113. The reversal of 221211102112 is 211201112122.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (221211102113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 269058 + ... + 717505.

It is an arithmetic number, because the mean of its divisors is an integer number (4133209878).

Almost surely, 2^221211102112 is an apocalyptic number.

221211102112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221211102112 is an abundant number, since it is smaller than the sum of its proper divisors (373971120320).

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

221211102112 is a wasteful number, since it uses less digits than its factorization.

221211102112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986611 (or 986596 counting only the distinct ones).

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

Adding to 221211102112 its reverse (211201112122), we get a palindrome (432412214234).

It can be divided in two parts, 221211 and 102112, that added together give a palindrome (323323).

The spelling of 221211102112 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred two thousand, one hundred twelve".