1212421412 has 12 divisors (see below), whose sum is σ = 2121994140. Its totient is φ = 606137376.

The previous prime is 1212421411. The next prime is 1212421429. The reversal of 1212421412 is 2141242121.

It can be written as a sum of positive squares in 2 ways, for example, as 633730276 + 578691136 = 25174^2 + 24056^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1212421411) 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, 38318 + ... + 62394.

It is an arithmetic number, because the mean of its divisors is an integer number (176832845).

Almost surely, 2^1212421412 is an apocalyptic number.

It is an amenable number.

1212421412 is a deficient number, since it is larger than the sum of its proper divisors (909572728).

1212421412 is a wasteful number, since it uses less digits than its factorization.

1212421412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36670 (or 36668 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

The square root of 1212421412 is about 34819.8422167591. The cubic root of 1212421412 is about 1066.3125791291.

Adding to 1212421412 its reverse (2141242121), we get a palindrome (3353663533).

The spelling of 1212421412 in words is "one billion, two hundred twelve million, four hundred twenty-one thousand, four hundred twelve".