103213201221 has 12 divisors (see below), whose sum is σ = 160553868748. Its totient is φ = 63515816064.

The previous prime is 103213201219. The next prime is 103213201229. The reversal of 103213201221 is 122102312301.

103213201221 is a `hidden beast` number, since 1 + 0 + 321 + 320 + 1 + 2 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 68575896900 + 34637304321 = 261870^2 + 186111^2 .

It is not a de Polignac number, because 103213201221 - 2¹ = 103213201219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103213201194 and 103213201203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103213201229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 441081940 + ... + 441082173.

Almost surely, 2^103213201221 is an apocalyptic number.

It is an amenable number.

103213201221 is a deficient number, since it is larger than the sum of its proper divisors (57340667527).

103213201221 is a wasteful number, since it uses less digits than its factorization.

103213201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882164132 (or 882164129 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 103213201221 its reverse (122102312301), we get a palindrome (225315513522).

The spelling of 103213201221 in words is "one hundred three billion, two hundred thirteen million, two hundred one thousand, two hundred twenty-one".