1221233131241 has 8 divisors (see below), whose sum is σ = 1233379255368. Its totient is φ = 1209088080000.

The previous prime is 1221233131213. The next prime is 1221233131273. The reversal of 1221233131241 is 1421313321221.

It can be written as a sum of positive squares in 4 ways, for example, as 216034392025 + 1005198739216 = 464795^2 + 1002596^2 .

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 1221233131241 - 2³⁰ = 1220159389417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221233131241.

It is not an unprimeable number, because it can be changed into a prime (1221233131201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2125301 + ... + 2638061.

It is an arithmetic number, because the mean of its divisors is an integer number (154172406921).

Almost surely, 2^{1221233131241} is an apocalyptic number.

It is an amenable number.

1221233131241 is a deficient number, since it is larger than the sum of its proper divisors (12146124127).

1221233131241 is a wasteful number, since it uses less digits than its factorization.

1221233131241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536443.

The product of its digits is 1728, while the sum is 26.

Adding to 1221233131241 its reverse (1421313321221), we get a palindrome (2642546452462).

The spelling of 1221233131241 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-three million, one hundred thirty-one thousand, two hundred forty-one".