1212104845 has 16 divisors (see below), whose sum is σ = 1760099328. Its totient is φ = 782265600.

The previous prime is 1212104843. The next prime is 1212104849. The reversal of 1212104845 is 5484012121.

It is not a de Polignac number, because 1212104845 - 2¹ = 1212104843 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212104843) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 1017981 + ... + 1019170.

It is an arithmetic number, because the mean of its divisors is an integer number (110006208).

Almost surely, 2^1212104845 is an apocalyptic number.

It is an amenable number.

1212104845 is a deficient number, since it is larger than the sum of its proper divisors (547994483).

1212104845 is a wasteful number, since it uses less digits than its factorization.

1212104845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037180.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 1212104845 is about 34815.2961354632. The cubic root of 1212104845 is about 1066.2197652075.

Adding to 1212104845 its reverse (5484012121), we get a palindrome (6696116966).

The spelling of 1212104845 in words is "one billion, two hundred twelve million, one hundred four thousand, eight hundred forty-five".