1211221323132 has 96 divisors (see below), whose sum is σ = 2956318348032. Its totient is φ = 385595375616.

The previous prime is 1211221323127. The next prime is 1211221323133. The reversal of 1211221323132 is 2313231221121.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211221323133) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 8346748 + ... + 8490620.

It is an arithmetic number, because the mean of its divisors is an integer number (30794982792).

Almost surely, 2^{1211221323132} is an apocalyptic number.

1211221323132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211221323132 is an abundant number, since it is smaller than the sum of its proper divisors (1745097024900).

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

1211221323132 is a wasteful number, since it uses less digits than its factorization.

1211221323132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144267 (or 144265 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

Adding to 1211221323132 its reverse (2313231221121), we get a palindrome (3524452544253).

The spelling of 1211221323132 in words is "one trillion, two hundred eleven billion, two hundred twenty-one million, three hundred twenty-three thousand, one hundred thirty-two".