1216111083 has 16 divisors (see below), whose sum is σ = 1769475456. Its totient is φ = 736792640.

The previous prime is 1216111081. The next prime is 1216111087. The reversal of 1216111083 is 3801116121.

1216111083 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1216111083 - 2¹ = 1216111081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216111081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175360 + ... + 182162.

It is an arithmetic number, because the mean of its divisors is an integer number (110592216).

Almost surely, 2^1216111083 is an apocalyptic number.

1216111083 is a deficient number, since it is larger than the sum of its proper divisors (553364373).

1216111083 is a wasteful number, since it uses less digits than its factorization.

1216111083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12234.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 1216111083 is about 34872.7842736997. The cubic root of 1216111083 is about 1067.3931600408.

The spelling of 1216111083 in words is "one billion, two hundred sixteen million, one hundred eleven thousand, eighty-three".