221111012112 has 20 divisors (see below), whose sum is σ = 571203448080. Its totient is φ = 73703670688.

The previous prime is 221111012081. The next prime is 221111012113. The reversal of 221111012112 is 211210111122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221111012091 and 221111012100.

It is not an unprimeable number, because it can be changed into a prime (221111012113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2303239662 + ... + 2303239757.

It is an arithmetic number, because the mean of its divisors is an integer number (28560172404).

Almost surely, 2^221111012112 is an apocalyptic number.

It is an amenable number.

221111012112 is an abundant number, since it is smaller than the sum of its proper divisors (350092435968).

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

221111012112 is a wasteful number, since it uses less digits than its factorization.

221111012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4606479430 (or 4606479424 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221111012112 its reverse (211210111122), we get a palindrome (432321123234).

It can be divided in two parts, 2211110 and 12112, that added together give a palindrome (2223222).

The spelling of 221111012112 in words is "two hundred twenty-one billion, one hundred eleven million, twelve thousand, one hundred twelve".