21101303131 has 8 divisors (see below), whose sum is σ = 21425076144. Its totient is φ = 20778468480.

The previous prime is 21101303059. The next prime is 21101303173. The reversal of 21101303131 is 13130310112.

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 21101303131 - 2¹³ = 21101294939 is a prime.

It is a super-2 number, since 2×21101303131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101303831) 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, 189205 + ... + 279286.

It is an arithmetic number, because the mean of its divisors is an integer number (2678134518).

Almost surely, 2^21101303131 is an apocalyptic number.

21101303131 is a deficient number, since it is larger than the sum of its proper divisors (323773013).

21101303131 is an equidigital number, since it uses as much as digits as its factorization.

21101303131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469181.

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

Adding to 21101303131 its reverse (13130310112), we get a palindrome (34231613243).

The spelling of 21101303131 in words is "twenty-one billion, one hundred one million, three hundred three thousand, one hundred thirty-one".