1211232111164 has 12 divisors (see below), whose sum is σ = 2120485174584. Its totient is φ = 605379204144.

The previous prime is 1211232111161. The next prime is 1211232111263. The reversal of 1211232111164 is 4611112321121.

It is a super-2 number, since 2×1211232111164² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211232111161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59201354 + ... + 59221809.

It is an arithmetic number, because the mean of its divisors is an integer number (176707097882).

Almost surely, 2^{1211232111164} is an apocalyptic number.

It is an amenable number.

1211232111164 is a deficient number, since it is larger than the sum of its proper divisors (909253063420).

1211232111164 is a wasteful number, since it uses less digits than its factorization.

1211232111164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118425724 (or 118425722 counting only the distinct ones).

The product of its digits is 576, while the sum is 26.

Adding to 1211232111164 its reverse (4611112321121), we get a palindrome (5822344432285).

The spelling of 1211232111164 in words is "one trillion, two hundred eleven billion, two hundred thirty-two million, one hundred eleven thousand, one hundred sixty-four".