1321411221 has 24 divisors (see below), whose sum is σ = 2163717920. Its totient is φ = 770376096.

The previous prime is 1321411123. The next prime is 1321411237. The reversal of 1321411221 is 1221141231.

1321411221 is a `hidden beast` number, since 1 + 32 + 1 + 411 + 221 = 666.

It is not a de Polignac number, because 1321411221 - 2⁷ = 1321411093 is a prime.

It is a super-2 number, since 2×1321411221² = 3492255229969421682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321411194 and 1321411203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321411621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 294991 + ... + 299436.

Almost surely, 2^1321411221 is an apocalyptic number.

It is an amenable number.

1321411221 is a deficient number, since it is larger than the sum of its proper divisors (842306699).

1321411221 is a wasteful number, since it uses less digits than its factorization.

1321411221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594465 (or 594462 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 1321411221 is about 36351.2203509043. The cubic root of 1321411221 is about 1097.3520941952.

Adding to 1321411221 its reverse (1221141231), we get a palindrome (2542552452).

The spelling of 1321411221 in words is "one billion, three hundred twenty-one million, four hundred eleven thousand, two hundred twenty-one".