1212112231 has 8 divisors (see below), whose sum is σ = 1324848528. Its totient is φ = 1099800000.

The previous prime is 1212112229. The next prime is 1212112261. The reversal of 1212112231 is 1322112121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212112231 - 2¹ = 1212112229 is a prime.

It is a super-2 number, since 2×1212112231² = 2938432121079594722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212112261) 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, 100020 + ... + 111481.

It is an arithmetic number, because the mean of its divisors is an integer number (165606066).

Almost surely, 2^1212112231 is an apocalyptic number.

1212112231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212112231 is a deficient number, since it is larger than the sum of its proper divisors (112736297).

1212112231 is a wasteful number, since it uses less digits than its factorization.

1212112231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212033.

The product of its digits is 48, while the sum is 16.

The square root of 1212112231 is about 34815.4022093670. The cubic root of 1212112231 is about 1066.2219308846.

Adding to 1212112231 its reverse (1322112121), we get a palindrome (2534224352).

The spelling of 1212112231 in words is "one billion, two hundred twelve million, one hundred twelve thousand, two hundred thirty-one".