1212141845 has 4 divisors (see below), whose sum is σ = 1454570220. Its totient is φ = 969713472.

The previous prime is 1212141829. The next prime is 1212141851. The reversal of 1212141845 is 5481412121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5481412121 = 157 ⋅34913453.

It can be written as a sum of positive squares in 2 ways, for example, as 607031044 + 605110801 = 24638^2 + 24599^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212141845 - 2⁴ = 1212141829 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121214180 + ... + 121214189.

It is an arithmetic number, because the mean of its divisors is an integer number (363642555).

Almost surely, 2^1212141845 is an apocalyptic number.

It is an amenable number.

1212141845 is a deficient number, since it is larger than the sum of its proper divisors (242428375).

1212141845 is an equidigital number, since it uses as much as digits as its factorization.

1212141845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242428374.

The product of its digits is 2560, while the sum is 29.

The square root of 1212141845 is about 34815.8275070405. The cubic root of 1212141845 is about 1066.2306140297.

Adding to 1212141845 its reverse (5481412121), we get a palindrome (6693553966).

The spelling of 1212141845 in words is "one billion, two hundred twelve million, one hundred forty-one thousand, eight hundred forty-five".