1212461812540 has 48 divisors (see below), whose sum is σ = 2898406748160. Its totient is φ = 421725846080.

The previous prime is 1212461812481. The next prime is 1212461812559. The reversal of 1212461812540 is 452181642121.

It is a self number, because there is not a number n which added to its sum of digits gives 1212461812540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119803420 + ... + 119813539.

It is an arithmetic number, because the mean of its divisors is an integer number (60383473920).

Almost surely, 2^{1212461812540} is an apocalyptic number.

1212461812540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212461812540 is an abundant number, since it is smaller than the sum of its proper divisors (1685944935620).

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

1212461812540 is a wasteful number, since it uses less digits than its factorization.

1212461812540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239617002 (or 239617000 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The spelling of 1212461812540 in words is "one trillion, two hundred twelve billion, four hundred sixty-one million, eight hundred twelve thousand, five hundred forty".