1221231412233 has 12 divisors (see below), whose sum is σ = 2016001061568. Its totient is φ = 697846521240.

The previous prime is 1221231412207. The next prime is 1221231412309. The reversal of 1221231412233 is 3322141321221.

1221231412233 is a `hidden beast` number, since 1 + 2 + 2 + 12 + 3 + 1 + 412 + 233 = 666.

It is not a de Polignac number, because 1221231412233 - 2³⁰ = 1220157670409 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1221231412197 and 1221231412206.

It is not an unprimeable number, because it can be changed into a prime (1221231412333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9692312733 + ... + 9692312858.

It is an arithmetic number, because the mean of its divisors is an integer number (168000088464).

Almost surely, 2^{1221231412233} is an apocalyptic number.

It is an amenable number.

1221231412233 is a deficient number, since it is larger than the sum of its proper divisors (794769649335).

1221231412233 is a wasteful number, since it uses less digits than its factorization.

1221231412233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19384625604 (or 19384625601 counting only the distinct ones).

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

Adding to 1221231412233 its reverse (3322141321221), we get a palindrome (4543372733454).

The spelling of 1221231412233 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-one million, four hundred twelve thousand, two hundred thirty-three".