1212101413 has 4 divisors (see below), whose sum is σ = 1225720620. Its totient is φ = 1198482208.

The previous prime is 1212101381. The next prime is 1212101419. The reversal of 1212101413 is 3141012121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3141012121 = 13 ⋅241616317.

It can be written as a sum of positive squares in 2 ways, for example, as 328406884 + 883694529 = 18122^2 + 29727^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212101413 - 2⁵ = 1212101381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212101419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6809470 + ... + 6809647.

It is an arithmetic number, because the mean of its divisors is an integer number (306430155).

Almost surely, 2^1212101413 is an apocalyptic number.

It is an amenable number.

1212101413 is a deficient number, since it is larger than the sum of its proper divisors (13619207).

1212101413 is an equidigital number, since it uses as much as digits as its factorization.

1212101413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13619206.

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

The square root of 1212101413 is about 34815.2468467480. The cubic root of 1212101413 is about 1066.2187588947.

Adding to 1212101413 its reverse (3141012121), we get a palindrome (4353113534).

The spelling of 1212101413 in words is "one billion, two hundred twelve million, one hundred one thousand, four hundred thirteen".