1216011110 has 16 divisors (see below), whose sum is σ = 2192875632. Its totient is φ = 485503200.

The previous prime is 1216011101. The next prime is 1216011131. The reversal of 1216011110 is 111106121.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106976 + ... + 117795.

It is an arithmetic number, because the mean of its divisors is an integer number (137054727).

Almost surely, 2^1216011110 is an apocalyptic number.

1216011110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216011110 is a deficient number, since it is larger than the sum of its proper divisors (976864522).

1216011110 is a wasteful number, since it uses less digits than its factorization.

1216011110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225319.

The product of its (nonzero) digits is 12, while the sum is 14.

The square root of 1216011110 is about 34871.3508485117. The cubic root of 1216011110 is about 1067.3639101304.

Adding to 1216011110 its reverse (111106121), we get a palindrome (1327117231).

It can be divided in two parts, 1216011 and 110, that added together give a palindrome (1216121).

The spelling of 1216011110 in words is "one billion, two hundred sixteen million, eleven thousand, one hundred ten".