1212136413 has 8 divisors (see below), whose sum is σ = 1620040800. Its totient is φ = 806161488.

The previous prime is 1212136411. The next prime is 1212136459. The reversal of 1212136413 is 3146312121.

It is a happy number.

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

It is not a de Polignac number, because 1212136413 - 2¹ = 1212136411 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212136411) 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, 480898 + ... + 483411.

It is an arithmetic number, because the mean of its divisors is an integer number (202505100).

Almost surely, 2^1212136413 is an apocalyptic number.

It is an amenable number.

1212136413 is a deficient number, since it is larger than the sum of its proper divisors (407904387).

1212136413 is an equidigital number, since it uses as much as digits as its factorization.

1212136413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964731.

The product of its digits is 864, while the sum is 24.

The square root of 1212136413 is about 34815.7494964563. The cubic root of 1212136413 is about 1066.2290213192.

Adding to 1212136413 its reverse (3146312121), we get a palindrome (4358448534).

The spelling of 1212136413 in words is "one billion, two hundred twelve million, one hundred thirty-six thousand, four hundred thirteen".