21113001101 has 2 divisors, whose sum is σ = 21113001102. Its totient is φ = 21113001100.

The previous prime is 21113001071. The next prime is 21113001113. The reversal of 21113001101 is 10110031112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20370711076 + 742290025 = 142726^2 + 27245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21113001101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113001601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556500550 + 10556500551.

It is an arithmetic number, because the mean of its divisors is an integer number (10556500551).

Almost surely, 2^21113001101 is an apocalyptic number.

It is an amenable number.

21113001101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113001101 is an equidigital number, since it uses as much as digits as its factorization.

21113001101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 21113001101 its reverse (10110031112), we get a palindrome (31223032213).

The spelling of 21113001101 in words is "twenty-one billion, one hundred thirteen million, one thousand, one hundred one".