21103313101 has 8 divisors (see below), whose sum is σ = 22727849144. Its totient is φ = 19478949120.

The previous prime is 21103313087. The next prime is 21103313111. The reversal of 21103313101 is 10131330112.

It can be written as a sum of positive squares in 4 ways, for example, as 33339076 + 21069974025 = 5774^2 + 145155^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21103313101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103313111) 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 7 ways as a sum of consecutive naturals, for example, 334465 + ... + 392521.

It is an arithmetic number, because the mean of its divisors is an integer number (2840981143).

Almost surely, 2^21103313101 is an apocalyptic number.

It is an amenable number.

21103313101 is a deficient number, since it is larger than the sum of its proper divisors (1624536043).

21103313101 is a wasteful number, since it uses less digits than its factorization.

21103313101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86031.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21103313101 its reverse (10131330112), we get a palindrome (31234643213).

The spelling of 21103313101 in words is "twenty-one billion, one hundred three million, three hundred thirteen thousand, one hundred one".