21131132113 has 16 divisors (see below), whose sum is σ = 26846503936. Its totient is φ = 16179808320.

The previous prime is 21131132069. The next prime is 21131132119. The reversal of 21131132113 is 31123113112.

It is not a de Polignac number, because 21131132113 - 2¹⁷ = 21131001041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21131132119) 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 15 ways as a sum of consecutive naturals, for example, 3742506 + ... + 3748147.

It is an arithmetic number, because the mean of its divisors is an integer number (1677906496).

Almost surely, 2^21131132113 is an apocalyptic number.

It is an amenable number.

21131132113 is a deficient number, since it is larger than the sum of its proper divisors (5715371823).

21131132113 is a wasteful number, since it uses less digits than its factorization.

21131132113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7490704.

The product of its digits is 108, while the sum is 19.

Adding to 21131132113 its reverse (31123113112), we get a palindrome (52254245225).

The spelling of 21131132113 in words is "twenty-one billion, one hundred thirty-one million, one hundred thirty-two thousand, one hundred thirteen".