1216006611 has 16 divisors (see below), whose sum is σ = 1638336000. Its totient is φ = 802212768.

The previous prime is 1216006601. The next prime is 1216006621. The reversal of 1216006611 is 1166006121.

1216006611 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1216006601) and next prime (1216006621).

It is not a de Polignac number, because 1216006611 - 2¹⁰ = 1216005587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216006601) 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, 127590 + ... + 136788.

It is an arithmetic number, because the mean of its divisors is an integer number (102396000).

Almost surely, 2^1216006611 is an apocalyptic number.

1216006611 is a deficient number, since it is larger than the sum of its proper divisors (422329389).

1216006611 is a wasteful number, since it uses less digits than its factorization.

1216006611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9658.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1216006611 is about 34871.2863399101. The cubic root of 1216006611 is about 1067.3625937839.

The spelling of 1216006611 in words is "one billion, two hundred sixteen million, six thousand, six hundred eleven".