221003203122 has 24 divisors (see below), whose sum is σ = 515674141164. Its totient is φ = 68000985504.

The previous prime is 221003203097. The next prime is 221003203139. The reversal of 221003203122 is 221302300122.

221003203122 is a `hidden beast` number, since 22 + 10 + 0 + 320 + 312 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 216680009121 + 4323194001 = 465489^2 + 65751^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221003203095 and 221003203104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 472228833 + ... + 472229300.

Almost surely, 2^221003203122 is an apocalyptic number.

221003203122 is an abundant number, since it is smaller than the sum of its proper divisors (294670938042).

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

221003203122 is a wasteful number, since it uses less digits than its factorization.

221003203122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944458154 (or 944458151 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 221003203122 its reverse (221302300122), we get a palindrome (442305503244).

The spelling of 221003203122 in words is "two hundred twenty-one billion, three million, two hundred three thousand, one hundred twenty-two".