1211331133312 has 32 divisors (see below), whose sum is σ = 2413322244000. Its totient is φ = 605634570240.

The previous prime is 1211331133301. The next prime is 1211331133321. The reversal of 1211331133312 is 2133311331121.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×1211331133312² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2379112 + ... + 2843032.

It is an arithmetic number, because the mean of its divisors is an integer number (75416320125).

Almost surely, 2^{1211331133312} is an apocalyptic number.

It is an amenable number.

1211331133312 is a deficient number, since it is larger than the sum of its proper divisors (1201991110688).

1211331133312 is an equidigital number, since it uses as much as digits as its factorization.

1211331133312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484334 (or 484322 counting only the distinct ones).

The product of its digits is 972, while the sum is 25.

Adding to 1211331133312 its reverse (2133311331121), we get a palindrome (3344642464433).

The spelling of 1211331133312 in words is "one trillion, two hundred eleven billion, three hundred thirty-one million, one hundred thirty-three thousand, three hundred twelve".