1213311434 has 4 divisors (see below), whose sum is σ = 1819967154. Its totient is φ = 606655716.

The previous prime is 1213311427. The next prime is 1213311461. The reversal of 1213311434 is 4341133121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1176284209 + 37027225 = 34297^2 + 6085^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303327857 + ... + 303327860.

Almost surely, 2^1213311434 is an apocalyptic number.

1213311434 is a deficient number, since it is larger than the sum of its proper divisors (606655720).

1213311434 is an equidigital number, since it uses as much as digits as its factorization.

1213311434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606655719.

The product of its digits is 864, while the sum is 23.

The square root of 1213311434 is about 34832.6202574541. The cubic root of 1213311434 is about 1066.5734371425.

Adding to 1213311434 its reverse (4341133121), we get a palindrome (5554444555).

The spelling of 1213311434 in words is "one billion, two hundred thirteen million, three hundred eleven thousand, four hundred thirty-four".