1212123333321 has 12 divisors (see below), whose sum is σ = 1757502022848. Its totient is φ = 805009664664.

The previous prime is 1212123333283. The next prime is 1212123333341. The reversal of 1212123333321 is 1233333212121.

1212123333321 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 1 + 2 + 3 + 333 + 321 = 666.

It is not a de Polignac number, because 1212123333321 - 2²¹ = 1212121236169 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1212123333341) 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 11 ways as a sum of consecutive naturals, for example, 256043965 + ... + 256048698.

It is an arithmetic number, because the mean of its divisors is an integer number (146458501904).

Almost surely, 2^{1212123333321} is an apocalyptic number.

It is an amenable number.

1212123333321 is a deficient number, since it is larger than the sum of its proper divisors (545378689527).

1212123333321 is a wasteful number, since it uses less digits than its factorization.

1212123333321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512092932 (or 512092929 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 1212123333321 its reverse (1233333212121), we get a palindrome (2445456545442).

The spelling of 1212123333321 in words is "one trillion, two hundred twelve billion, one hundred twenty-three million, three hundred thirty-three thousand, three hundred twenty-one".