21350131125 has 16 divisors (see below), whose sum is σ = 35526618816. Its totient is φ = 11386736400.

The previous prime is 21350131097. The next prime is 21350131169. The reversal of 21350131125 is 52113105312.

It is not a de Polignac number, because 21350131125 - 2¹¹ = 21350129077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21350131095 and 21350131104.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 28466467 + ... + 28467216.

It is an arithmetic number, because the mean of its divisors is an integer number (2220413676).

Almost surely, 2^21350131125 is an apocalyptic number.

21350131125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21350131125 is a deficient number, since it is larger than the sum of its proper divisors (14176487691).

21350131125 is an equidigital number, since it uses as much as digits as its factorization.

21350131125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56933701 (or 56933691 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 21350131125 its reverse (52113105312), we get a palindrome (73463236437).

The spelling of 21350131125 in words is "twenty-one billion, three hundred fifty million, one hundred thirty-one thousand, one hundred twenty-five".