1212421313 has 2 divisors, whose sum is σ = 1212421314. Its totient is φ = 1212421312.

The previous prime is 1212421307. The next prime is 1212421319. The reversal of 1212421313 is 3131242121.

It is a balanced prime because it is at equal distance from previous prime (1212421307) and next prime (1212421319).

It can be written as a sum of positive squares in only one way, i.e., 1143995329 + 68425984 = 33823^2 + 8272^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212421313 - 2⁴ = 1212421297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212421319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606210656 + 606210657.

It is an arithmetic number, because the mean of its divisors is an integer number (606210657).

Almost surely, 2^1212421313 is an apocalyptic number.

It is an amenable number.

1212421313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212421313 is an equidigital number, since it uses as much as digits as its factorization.

1212421313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 1212421313 is about 34819.8407951559. The cubic root of 1212421313 is about 1066.3125501060.

Adding to 1212421313 its reverse (3131242121), we get a palindrome (4343663434).

The spelling of 1212421313 in words is "one billion, two hundred twelve million, four hundred twenty-one thousand, three hundred thirteen".