1221233311232 has 40 divisors (see below), whose sum is σ = 2661906995352. Its totient is φ = 555106048000.

The previous prime is 1221233311229. The next prime is 1221233311261. The reversal of 1221233311232 is 2321133321221.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 108413519 + ... + 108424782.

Almost surely, 2^{1221233311232} is an apocalyptic number.

It is an amenable number.

1221233311232 is an abundant number, since it is smaller than the sum of its proper divisors (1440673684120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221233311232 is an equidigital number, since it uses as much as digits as its factorization.

1221233311232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216838330 (or 216838314 counting only the distinct ones).

The product of its digits is 2592, while the sum is 26.

Adding to 1221233311232 its reverse (2321133321221), we get a palindrome (3542366632453).

The spelling of 1221233311232 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-three million, three hundred eleven thousand, two hundred thirty-two".