1221122233312 has 24 divisors (see below), whose sum is σ = 2433049274376. Its totient is φ = 603204957312.

The previous prime is 1221122233307. The next prime is 1221122233327. The reversal of 1221122233312 is 2133322211221.

It is a super-2 number, since 2×1221122233312² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 229877283 + ... + 229882594.

It is an arithmetic number, because the mean of its divisors is an integer number (101377053099).

Almost surely, 2^{1221122233312} is an apocalyptic number.

It is an amenable number.

1221122233312 is a deficient number, since it is larger than the sum of its proper divisors (1211927041064).

1221122233312 is an equidigital number, since it uses as much as digits as its factorization.

1221122233312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459759970 (or 459759962 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

Adding to 1221122233312 its reverse (2133322211221), we get a palindrome (3354444444533).

The spelling of 1221122233312 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred thirty-three thousand, three hundred twelve".