1216885006233 has 24 divisors (see below), whose sum is σ = 1893303382152. Its totient is φ = 748705483008.

The previous prime is 1216885006229. The next prime is 1216885006241. The reversal of 1216885006233 is 3326005886121.

1216885006233 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 88 + 500 + 62 + 3 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 160505999424 + 1056379006809 = 400632^2 + 1027803^2 .

It is not a de Polignac number, because 1216885006233 - 2² = 1216885006229 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216885006243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 418866 + ... + 1615307.

It is an arithmetic number, because the mean of its divisors is an integer number (78887640923).

Almost surely, 2^{1216885006233} is an apocalyptic number.

1216885006233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1216885006233 is a deficient number, since it is larger than the sum of its proper divisors (676418375919).

1216885006233 is a wasteful number, since it uses less digits than its factorization.

1216885006233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039305 (or 2039302 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 1216885006233 in words is "one trillion, two hundred sixteen billion, eight hundred eighty-five million, six thousand, two hundred thirty-three".