1213322043 has 4 divisors (see below), whose sum is σ = 1617762728. Its totient is φ = 808881360.

The previous prime is 1213322041. The next prime is 1213322087. The reversal of 1213322043 is 3402233121.

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

It is not a de Polignac number, because 1213322043 - 2¹ = 1213322041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213322041) 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, 202220338 + ... + 202220343.

It is an arithmetic number, because the mean of its divisors is an integer number (404440682).

Almost surely, 2^1213322043 is an apocalyptic number.

1213322043 is a deficient number, since it is larger than the sum of its proper divisors (404440685).

1213322043 is an equidigital number, since it uses as much as digits as its factorization.

1213322043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404440684.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1213322043 is about 34832.7725425353. The cubic root of 1213322043 is about 1066.5765457823.

Adding to 1213322043 its reverse (3402233121), we get a palindrome (4615555164).

The spelling of 1213322043 in words is "one billion, two hundred thirteen million, three hundred twenty-two thousand, forty-three".