1211133312311 has 8 divisors (see below), whose sum is σ = 1304346595440. Its totient is φ = 1117927055232.

The previous prime is 1211133312293. The next prime is 1211133312341. The reversal of 1211133312311 is 1132133311121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211133312311 - 2¹⁴ = 1211133295927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211133312341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1395746 + ... + 2090543.

It is an arithmetic number, because the mean of its divisors is an integer number (163043324430).

Almost surely, 2^{1211133312311} is an apocalyptic number.

1211133312311 is a deficient number, since it is larger than the sum of its proper divisors (93213283129).

1211133312311 is a wasteful number, since it uses less digits than its factorization.

1211133312311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513025.

The product of its digits is 324, while the sum is 23.

Adding to 1211133312311 its reverse (1132133311121), we get a palindrome (2343266623432).

The spelling of 1211133312311 in words is "one trillion, two hundred eleven billion, one hundred thirty-three million, three hundred twelve thousand, three hundred eleven".