221222011120 has 40 divisors (see below), whose sum is σ = 561099466800. Its totient is φ = 80444367360.

The previous prime is 221222011111. The next prime is 221222011121. The reversal of 221222011120 is 21110222122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a junction number, because it is equal to n+sod(n) for n = 221222011094 and 221222011103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222011121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125693445 + ... + 125695204.

It is an arithmetic number, because the mean of its divisors is an integer number (14027486670).

Almost surely, 2^221222011120 is an apocalyptic number.

221222011120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222011120 is an abundant number, since it is smaller than the sum of its proper divisors (339877455680).

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

221222011120 is a wasteful number, since it uses less digits than its factorization.

221222011120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251388673 (or 251388667 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221222011120 its reverse (21110222122), we get a palindrome (242332233242).

The spelling of 221222011120 in words is "two hundred twenty-one billion, two hundred twenty-two million, eleven thousand, one hundred twenty".