221020222112 has 48 divisors (see below), whose sum is σ = 461042428392. Its totient is φ = 103938908160.

The previous prime is 221020222067. The next prime is 221020222117. The reversal of 221020222112 is 211222020122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 220828565776 + 191656336 = 469924^2 + 13844^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (221020222117) 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, 668498 + ... + 942830.

Almost surely, 2^221020222112 is an apocalyptic number.

It is an amenable number.

221020222112 is an abundant number, since it is smaller than the sum of its proper divisors (240022206280).

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

221020222112 is a wasteful number, since it uses less digits than its factorization.

221020222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275841 (or 275833 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221020222112 its reverse (211222020122), we get a palindrome (432242242234).

The spelling of 221020222112 in words is "two hundred twenty-one billion, twenty million, two hundred twenty-two thousand, one hundred twelve".