21112357026 has 8 divisors (see below), whose sum is σ = 42224714064. Its totient is φ = 7037452340.

The previous prime is 21112357009. The next prime is 21112357033. The reversal of 21112357026 is 62075321112.

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

21112357026 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21112356984 and 21112357002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1759363080 + ... + 1759363091.

It is an arithmetic number, because the mean of its divisors is an integer number (5278089258).

Almost surely, 2^21112357026 is an apocalyptic number.

21112357026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21112357026 is a wasteful number, since it uses less digits than its factorization.

21112357026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518726176.

The product of its (nonzero) digits is 5040, while the sum is 30.

Adding to 21112357026 its reverse (62075321112), we get a palindrome (83187678138).

The spelling of 21112357026 in words is "twenty-one billion, one hundred twelve million, three hundred fifty-seven thousand, twenty-six".