1221040313433 has 6 divisors (see below), whose sum is σ = 1763724897194. Its totient is φ = 814026875616.

The previous prime is 1221040313357. The next prime is 1221040313453. The reversal of 1221040313433 is 3343130401221.

It is a happy number.

1221040313433 is a `hidden beast` number, since 1 + 2 + 210 + 4 + 0 + 3 + 13 + 433 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1205070431049 + 15969882384 = 1097757^2 + 126372^2 .

It is not a de Polignac number, because 1221040313433 - 2¹⁷ = 1221040182361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221040313397 and 1221040313406.

It is not an unprimeable number, because it can be changed into a prime (1221040313453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67835572960 + ... + 67835572977.

Almost surely, 2^{1221040313433} is an apocalyptic number.

It is an amenable number.

1221040313433 is a deficient number, since it is larger than the sum of its proper divisors (542684583761).

1221040313433 is a wasteful number, since it uses less digits than its factorization.

1221040313433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135671145943 (or 135671145940 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 1221040313433 its reverse (3343130401221), we get a palindrome (4564170714654).

The spelling of 1221040313433 in words is "one trillion, two hundred twenty-one billion, forty million, three hundred thirteen thousand, four hundred thirty-three".