1212012113 has 8 divisors (see below), whose sum is σ = 1307181288. Its totient is φ = 1117119744.

The previous prime is 1212012107. The next prime is 1212012119. The reversal of 1212012113 is 3112102121.

It is an interprime number because it is at equal distance from previous prime (1212012107) and next prime (1212012119).

It can be written as a sum of positive squares in 4 ways, for example, as 144552529 + 1067459584 = 12023^2 + 32672^2 .

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

It is not a de Polignac number, because 1212012113 - 2⁴ = 1212012097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212012119) 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, 60056 + ... + 77657.

It is an arithmetic number, because the mean of its divisors is an integer number (163397661).

Almost surely, 2^1212012113 is an apocalyptic number.

1212012113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1212012113 is a deficient number, since it is larger than the sum of its proper divisors (95169175).

1212012113 is a wasteful number, since it uses less digits than its factorization.

1212012113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138403.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1212012113 is about 34813.9643390407. The cubic root of 1212012113 is about 1066.1925741568.

Adding to 1212012113 its reverse (3112102121), we get a palindrome (4324114234).

The spelling of 1212012113 in words is "one billion, two hundred twelve million, twelve thousand, one hundred thirteen".