1223031135521 has 8 divisors (see below), whose sum is σ = 1347740929920. Its totient is φ = 1102697123472.

The previous prime is 1223031135481. The next prime is 1223031135523. The reversal of 1223031135521 is 1255311303221.

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 1223031135521 - 2³⁰ = 1221957393697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223031135523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093945001 + ... + 1093946118.

It is an arithmetic number, because the mean of its divisors is an integer number (168467616240).

Almost surely, 2^{1223031135521} is an apocalyptic number.

It is an amenable number.

1223031135521 is a deficient number, since it is larger than the sum of its proper divisors (124709794399).

1223031135521 is a wasteful number, since it uses less digits than its factorization.

1223031135521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187891175.

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 1223031135521 its reverse (1255311303221), we get a palindrome (2478342438742).

The spelling of 1223031135521 in words is "one trillion, two hundred twenty-three billion, thirty-one million, one hundred thirty-five thousand, five hundred twenty-one".