1216320236121 has 32 divisors (see below), whose sum is σ = 1696863755520. Its totient is φ = 773521056000.

The previous prime is 1216320236113. The next prime is 1216320236129.

1216320236121 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (1216320236113) and next prime (1216320236129).

It is not a de Polignac number, because 1216320236121 - 2³ = 1216320236113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216320236129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122843271 + ... + 122853171.

It is an arithmetic number, because the mean of its divisors is an integer number (53026992360).

Almost surely, 2^{1216320236121} is an apocalyptic number.

It is an amenable number.

1216320236121 is a deficient number, since it is larger than the sum of its proper divisors (480543519399).

1216320236121 is a wasteful number, since it uses less digits than its factorization.

1216320236121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14577.

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 1216320236121 in words is "one trillion, two hundred sixteen billion, three hundred twenty million, two hundred thirty-six thousand, one hundred twenty-one".