21116635041 has 16 divisors (see below), whose sum is σ = 30392760960. Its totient is φ = 13001345280.

The previous prime is 21116635037. The next prime is 21116635049. The reversal of 21116635041 is 14053661112.

It is a happy number.

It is not a de Polignac number, because 21116635041 - 2² = 21116635037 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21116635049) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5274520 + ... + 5278521.

It is an arithmetic number, because the mean of its divisors is an integer number (1899547560).

Almost surely, 2^21116635041 is an apocalyptic number.

It is an amenable number.

21116635041 is a deficient number, since it is larger than the sum of its proper divisors (9276125919).

21116635041 is a wasteful number, since it uses less digits than its factorization.

21116635041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10553096.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 21116635041 in words is "twenty-one billion, one hundred sixteen million, six hundred thirty-five thousand, forty-one".