1212112311 has 8 divisors (see below), whose sum is σ = 1617469680. Its totient is φ = 807414912.

The previous prime is 1212112301. The next prime is 1212112331. The reversal of 1212112311 is 1132112121.

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

It is not a de Polignac number, because 1212112311 - 2³⁰ = 138370487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212112301) 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 7 ways as a sum of consecutive naturals, for example, 160690 + ... + 168063.

It is an arithmetic number, because the mean of its divisors is an integer number (202183710).

Almost surely, 2^1212112311 is an apocalyptic number.

1212112311 is a deficient number, since it is larger than the sum of its proper divisors (405357369).

1212112311 is a wasteful number, since it uses less digits than its factorization.

1212112311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329985.

The product of its digits is 24, while the sum is 15.

The square root of 1212112311 is about 34815.4033582838. The cubic root of 1212112311 is about 1066.2219543417.

Adding to 1212112311 its reverse (1132112121), we get a palindrome (2344224432).

The spelling of 1212112311 in words is "one billion, two hundred twelve million, one hundred twelve thousand, three hundred eleven".