1216426901107 has 4 divisors (see below), whose sum is σ = 1327011164856. Its totient is φ = 1105842637360.

The previous prime is 1216426901083. The next prime is 1216426901117. The reversal of 1216426901107 is 7011096246121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1216426901107 - 2³⁵ = 1182067162739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1216426901107.

It is not an unprimeable number, because it can be changed into a prime (1216426901117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55292131858 + ... + 55292131879.

It is an arithmetic number, because the mean of its divisors is an integer number (331752791214).

Almost surely, 2^{1216426901107} is an apocalyptic number.

1216426901107 is a deficient number, since it is larger than the sum of its proper divisors (110584263749).

1216426901107 is a wasteful number, since it uses less digits than its factorization.

1216426901107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110584263748.

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 1216426901107 in words is "one trillion, two hundred sixteen billion, four hundred twenty-six million, nine hundred one thousand, one hundred seven".