11121601663 has 2 divisors, whose sum is σ = 11121601664. Its totient is φ = 11121601662.

The previous prime is 11121601661. The next prime is 11121601669. The reversal of 11121601663 is 36610612111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11121601663 - 2¹ = 11121601661 is a prime.

Together with 11121601661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121601661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560800831 + 5560800832.

It is an arithmetic number, because the mean of its divisors is an integer number (5560800832).

Almost surely, 2^11121601663 is an apocalyptic number.

11121601663 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121601663 is an equidigital number, since it uses as much as digits as its factorization.

11121601663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 11121601663 in words is "eleven billion, one hundred twenty-one million, six hundred one thousand, six hundred sixty-three".