1218214550870 has 64 divisors (see below), whose sum is σ = 2211722827776. Its totient is φ = 483101255040.

The previous prime is 1218214550857. The next prime is 1218214550899. The reversal of 1218214550870 is 780554128121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 989613155 + ... + 989614385.

It is an arithmetic number, because the mean of its divisors is an integer number (34558169184).

Almost surely, 2^{1218214550870} is an apocalyptic number.

1218214550870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1218214550870 is a deficient number, since it is larger than the sum of its proper divisors (993508276906).

1218214550870 is a wasteful number, since it uses less digits than its factorization.

1218214550870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005.

The product of its (nonzero) digits is 179200, while the sum is 44.

Adding to 1218214550870 its reverse (780554128121), we get a palindrome (1998768678991).

The spelling of 1218214550870 in words is "one trillion, two hundred eighteen billion, two hundred fourteen million, five hundred fifty thousand, eight hundred seventy".