1211332111320 has 64 divisors (see below), whose sum is σ = 3635861580000. Its totient is φ = 322856096768.

The previous prime is 1211332111303. The next prime is 1211332111357. The reversal of 1211332111320 is 231112331121.

It is a congruent number.

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, 2355765 + ... + 2823524.

Almost surely, 2^{1211332111320} is an apocalyptic number.

1211332111320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211332111320 is an abundant number, since it is smaller than the sum of its proper divisors (2424529468680).

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

1211332111320 is a wasteful number, since it uses less digits than its factorization.

1211332111320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5181252 (or 5181248 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1211332111320 its reverse (231112331121), we get a palindrome (1442444442441).

The spelling of 1211332111320 in words is "one trillion, two hundred eleven billion, three hundred thirty-two million, one hundred eleven thousand, three hundred twenty".