21110235126 has 16 divisors (see below), whose sum is σ = 42234803184. Its totient is φ = 7034356224.

The previous prime is 21110235121. The next prime is 21110235131. The reversal of 21110235126 is 62153201112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21110235121) and next prime (21110235131).

It is a junction number, because it is equal to n+sod(n) for n = 21110235096 and 21110235105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110235121) 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, 578011 + ... + 613446.

It is an arithmetic number, because the mean of its divisors is an integer number (2639675199).

Almost surely, 2^21110235126 is an apocalyptic number.

21110235126 is an abundant number, since it is smaller than the sum of its proper divisors (21124568058).

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

21110235126 is a wasteful number, since it uses less digits than its factorization.

21110235126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194415.

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 21110235126 its reverse (62153201112), we get a palindrome (83263436238).

The spelling of 21110235126 in words is "twenty-one billion, one hundred ten million, two hundred thirty-five thousand, one hundred twenty-six".