1218211083076 has 27 divisors (see below), whose sum is σ = 2308528341693. Its totient is φ = 562238024400.

The previous prime is 1218211083059. The next prime is 1218211083077. The reversal of 1218211083076 is 6703801128121.

The square root of 1218211083076 is 1103726.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 180208740100 + 1038002342976 = 424510^2 + 1018824^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1218211083077) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 28675651 + ... + 28718101.

Almost surely, 2^{1218211083076} is an apocalyptic number.

1218211083076 is the 1103726-th square number.

It is an amenable number.

1218211083076 is a deficient number, since it is larger than the sum of its proper divisors (1090317258617).

1218211083076 is an frugal number, since it uses more digits than its factorization.

1218211083076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84932 (or 42466 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 40.

The spelling of 1218211083076 in words is "one trillion, two hundred eighteen billion, two hundred eleven million, eighty-three thousand, seventy-six".