1213405042120 has 32 divisors (see below), whose sum is σ = 2730203174520. Its totient is φ = 485354580480.

The previous prime is 1213405042099. The next prime is 1213405042147. The reversal of 1213405042120 is 212405043121.

It can be written as a sum of positive squares in 4 ways, for example, as 1124647524036 + 88757518084 = 1060494^2 + 297922^2 .

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 7 ways as a sum of consecutive naturals, for example, 2948524 + ... + 3334756.

Almost surely, 2^{1213405042120} is an apocalyptic number.

1213405042120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213405042120 is an abundant number, since it is smaller than the sum of its proper divisors (1516798132400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213405042120 is a wasteful number, since it uses less digits than its factorization.

1213405042120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464785 (or 464781 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The spelling of 1213405042120 in words is "one trillion, two hundred thirteen billion, four hundred five million, forty-two thousand, one hundred twenty".