1212331221330 has 32 divisors (see below), whose sum is σ = 2909628782784. Its totient is φ = 323284564416.

The previous prime is 1212331221329. The next prime is 1212331221379. The reversal of 1212331221330 is 331221332121.

It is a super-2 number, since 2×1212331221330² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212331221330.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3217917 + ... + 3574863.

It is an arithmetic number, because the mean of its divisors is an integer number (90925899462).

Almost surely, 2^{1212331221330} is an apocalyptic number.

1212331221330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212331221330 is an abundant number, since it is smaller than the sum of its proper divisors (1697297561454).

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

1212331221330 is a wasteful number, since it uses less digits than its factorization.

1212331221330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470170.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1212331221330 its reverse (331221332121), we get a palindrome (1543552553451).

The spelling of 1212331221330 in words is "one trillion, two hundred twelve billion, three hundred thirty-one million, two hundred twenty-one thousand, three hundred thirty".