21131300101 has 8 divisors (see below), whose sum is σ = 22400440920. Its totient is φ = 19865061888.

The previous prime is 21131300087. The next prime is 21131300123. The reversal of 21131300101 is 10100313112.

It can be written as a sum of positive squares in 4 ways, for example, as 17226300001 + 3905000100 = 131249^2 + 62490^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21131300101 - 2⁹ = 21131299589 is a prime.

It is a super-2 number, since 2×21131300101² (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 (21131300131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 710646 + ... + 739783.

It is an arithmetic number, because the mean of its divisors is an integer number (2800055115).

Almost surely, 2^21131300101 is an apocalyptic number.

It is an amenable number.

21131300101 is a deficient number, since it is larger than the sum of its proper divisors (1269140819).

21131300101 is a wasteful number, since it uses less digits than its factorization.

21131300101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451303.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 21131300101 its reverse (10100313112), we get a palindrome (31231613213).

The spelling of 21131300101 in words is "twenty-one billion, one hundred thirty-one million, three hundred thousand, one hundred one".