1161216121611 has 128 divisors (see below), whose sum is σ = 2075454130176. Its totient is φ = 560021299200.

The previous prime is 1161216121609. The next prime is 1161216121619.

1161216121611 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1161216121611 - 2¹ = 1161216121609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161216121619) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 117277761 + ... + 117287661.

It is an arithmetic number, because the mean of its divisors is an integer number (16214485392).

Almost surely, 2^{1161216121611} is an apocalyptic number.

1161216121611 is a deficient number, since it is larger than the sum of its proper divisors (914238008565).

1161216121611 is a wasteful number, since it uses less digits than its factorization.

1161216121611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10661.

The product of its digits is 864, while the sum is 30.

The spelling of 1161216121611 in words is "one trillion, one hundred sixty-one billion, two hundred sixteen million, one hundred twenty-one thousand, six hundred eleven".