1216152105 has 32 divisors (see below), whose sum is σ = 2250630144. Its totient is φ = 549253056.

The previous prime is 1216152097. The next prime is 1216152107. The reversal of 1216152105 is 5012516121.

It is not a de Polignac number, because 1216152105 - 2³ = 1216152097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216152107) 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, 61059 + ... + 78488.

It is an arithmetic number, because the mean of its divisors is an integer number (70332192).

Almost surely, 2^1216152105 is an apocalyptic number.

1216152105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1216152105 is a deficient number, since it is larger than the sum of its proper divisors (1034478039).

1216152105 is a wasteful number, since it uses less digits than its factorization.

1216152105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139645.

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 1216152105 is about 34873.3724351403. The cubic root of 1216152105 is about 1067.4051617158.

Adding to 1216152105 its reverse (5012516121), we get a palindrome (6228668226).

The spelling of 1216152105 in words is "one billion, two hundred sixteen million, one hundred fifty-two thousand, one hundred five".