221240122 has 8 divisors (see below), whose sum is σ = 335281716. Its totient is φ = 109479552.

The previous prime is 221240119. The next prime is 221240143. The reversal of 221240122 is 221042122.

It can be written as a sum of positive squares in 2 ways, for example, as 220789881 + 450241 = 14859^2 + 671^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221240096 and 221240105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570013 + ... + 570400.

Almost surely, 2^221240122 is an apocalyptic number.

221240122 is a deficient number, since it is larger than the sum of its proper divisors (114041594).

221240122 is a wasteful number, since it uses less digits than its factorization.

221240122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140512.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 221240122 is about 14874.1427315997. The cubic root of 221240122 is about 604.8132492834.

Adding to 221240122 its reverse (221042122), we get a palindrome (442282244).

The spelling of 221240122 in words is "two hundred twenty-one million, two hundred forty thousand, one hundred twenty-two".