21303313101 has 24 divisors (see below), whose sum is σ = 35743894784. Its totient is φ = 11973756960.

The previous prime is 21303313081. The next prime is 21303313151. The reversal of 21303313101 is 10131330312.

It is a happy number.

21303313101 is a `hidden beast` number, since 21 + 3 + 0 + 331 + 310 + 1 = 666.

It is not a de Polignac number, because 21303313101 - 2¹⁰ = 21303312077 is a prime.

It is a super-2 number, since 2×21303313101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303313151) 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 in 23 ways as a sum of consecutive naturals, for example, 2767861 + ... + 2775546.

Almost surely, 2^21303313101 is an apocalyptic number.

21303313101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21303313101 is a deficient number, since it is larger than the sum of its proper divisors (14440581683).

21303313101 is a wasteful number, since it uses less digits than its factorization.

21303313101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5543481 (or 5543478 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 21303313101 its reverse (10131330312), we get a palindrome (31434643413).

The spelling of 21303313101 in words is "twenty-one billion, three hundred three million, three hundred thirteen thousand, one hundred one".