21235101427 has 8 divisors (see below), whose sum is σ = 21312824400. Its totient is φ = 21157508064.

The previous prime is 21235101397. The next prime is 21235101431. The reversal of 21235101427 is 72410153212.

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 21235101427 - 2⁷ = 21235101299 is a prime.

It is a super-2 number, since 2×21235101427² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21235101395 and 21235101404.

It is not an unprimeable number, because it can be changed into a prime (21235191427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302149 + ... + 365737.

It is an arithmetic number, because the mean of its divisors is an integer number (2664103050).

Almost surely, 2^21235101427 is an apocalyptic number.

21235101427 is a deficient number, since it is larger than the sum of its proper divisors (77722973).

21235101427 is an equidigital number, since it uses as much as digits as its factorization.

21235101427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64805.

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 21235101427 its reverse (72410153212), we get a palindrome (93645254639).

The spelling of 21235101427 in words is "twenty-one billion, two hundred thirty-five million, one hundred one thousand, four hundred twenty-seven".