1221322213341 has 24 divisors (see below), whose sum is σ = 1785144414144. Its totient is φ = 804543425280.

The previous prime is 1221322213337. The next prime is 1221322213357. The reversal of 1221322213341 is 1433122231221.

1221322213341 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 322 + 2 + 1 + 334 + 1 = 666.

It is not a de Polignac number, because 1221322213341 - 2² = 1221322213337 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221322211341) 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, 557691 + ... + 1659416.

It is an arithmetic number, because the mean of its divisors is an integer number (74381017256).

Almost surely, 2^{1221322213341} is an apocalyptic number.

It is an amenable number.

1221322213341 is a deficient number, since it is larger than the sum of its proper divisors (563822200803).

1221322213341 is a wasteful number, since it uses less digits than its factorization.

1221322213341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217841 (or 2217838 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 1221322213341 its reverse (1433122231221), we get a palindrome (2654444444562).

The spelling of 1221322213341 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-two million, two hundred thirteen thousand, three hundred forty-one".