1212342105 has 32 divisors (see below), whose sum is σ = 2098002816. Its totient is φ = 594261504.

The previous prime is 1212342059. The next prime is 1212342107. The reversal of 1212342105 is 5012432121.

It is not a de Polignac number, because 1212342105 - 2¹⁵ = 1212309337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212342107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32094 + ... + 58776.

It is an arithmetic number, because the mean of its divisors is an integer number (65562588).

Almost surely, 2^1212342105 is an apocalyptic number.

1212342105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1212342105 is a deficient number, since it is larger than the sum of its proper divisors (885660711).

1212342105 is a wasteful number, since it uses less digits than its factorization.

1212342105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26937.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1212342105 is about 34818.7033790749. The cubic root of 1212342105 is about 1066.2893287161.

Adding to 1212342105 its reverse (5012432121), we get a palindrome (6224774226).

The spelling of 1212342105 in words is "one billion, two hundred twelve million, three hundred forty-two thousand, one hundred five".