1221321222133 has 8 divisors (see below), whose sum is σ = 1222209461088. Its totient is φ = 1220433099504.

The previous prime is 1221321222109. The next prime is 1221321222139. The reversal of 1221321222133 is 3312221231221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221321222133 - 2⁵ = 1221321222101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221321222098 and 1221321222107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221321222139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42625110 + ... + 42653752.

It is an arithmetic number, because the mean of its divisors is an integer number (152776182636).

Almost surely, 2^{1221321222133} is an apocalyptic number.

It is an amenable number.

1221321222133 is a deficient number, since it is larger than the sum of its proper divisors (888238955).

1221321222133 is a wasteful number, since it uses less digits than its factorization.

1221321222133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58163.

The product of its digits is 1728, while the sum is 25.

Adding to 1221321222133 its reverse (3312221231221), we get a palindrome (4533542453354).

The spelling of 1221321222133 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-one million, two hundred twenty-two thousand, one hundred thirty-three".