1213122045 has 16 divisors (see below), whose sum is σ = 1942036992. Its totient is φ = 646651200.

The previous prime is 1213122017. The next prime is 1213122059. The reversal of 1213122045 is 5402213121.

It is not a de Polignac number, because 1213122045 - 2¹² = 1213117949 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8539 + ... + 49991.

It is an arithmetic number, because the mean of its divisors is an integer number (121377312).

Almost surely, 2^1213122045 is an apocalyptic number.

1213122045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213122045 is a deficient number, since it is larger than the sum of its proper divisors (728914947).

1213122045 is a wasteful number, since it uses less digits than its factorization.

1213122045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43412.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1213122045 is about 34829.9015933149. The cubic root of 1213122045 is about 1066.5179394959.

Adding to 1213122045 its reverse (5402213121), we get a palindrome (6615335166).

The spelling of 1213122045 in words is "one billion, two hundred thirteen million, one hundred twenty-two thousand, forty-five".