1211321113332 has 144 divisors (see below), whose sum is σ = 3144385319040. Its totient is φ = 362624261120.

The previous prime is 1211321113259. The next prime is 1211321113337. The reversal of 1211321113332 is 2333111231121.

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 (1211321113337) 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 47 ways as a sum of consecutive naturals, for example, 176651248 + ... + 176658104.

It is an arithmetic number, because the mean of its divisors is an integer number (21836009160).

Almost surely, 2^{1211321113332} is an apocalyptic number.

1211321113332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211321113332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1572192659520).

1211321113332 is an abundant number, since it is smaller than the sum of its proper divisors (1933064205708).

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

1211321113332 is a wasteful number, since it uses less digits than its factorization.

1211321113332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8342 (or 8329 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

Adding to 1211321113332 its reverse (2333111231121), we get a palindrome (3544432344453).

The spelling of 1211321113332 in words is "one trillion, two hundred eleven billion, three hundred twenty-one million, one hundred thirteen thousand, three hundred thirty-two".