1212331005 has 24 divisors (see below), whose sum is σ = 2211973920. Its totient is φ = 612545760.

The previous prime is 1212330991. The next prime is 1212331037. The reversal of 1212331005 is 5001332121.

It is not a de Polignac number, because 1212331005 - 2¹⁸ = 1212068861 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 708111 + ... + 709820.

It is an arithmetic number, because the mean of its divisors is an integer number (92165580).

Almost surely, 2^1212331005 is an apocalyptic number.

1212331005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1212331005 is a deficient number, since it is larger than the sum of its proper divisors (999642915).

1212331005 is a wasteful number, since it uses less digits than its factorization.

1212331005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417961 (or 1417958 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1212331005 is about 34818.5439816199. The cubic root of 1212331005 is about 1066.2860744511.

Adding to 1212331005 its reverse (5001332121), we get a palindrome (6213663126).

The spelling of 1212331005 in words is "one billion, two hundred twelve million, three hundred thirty-one thousand, five".