21110223344 has 40 divisors (see below), whose sum is σ = 48355937760. Its totient is φ = 8735263488.

The previous prime is 21110223317. The next prime is 21110223359. The reversal of 21110223344 is 44332201112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3246479 + ... + 3252974.

It is an arithmetic number, because the mean of its divisors is an integer number (1208898444).

Almost surely, 2^21110223344 is an apocalyptic number.

It is an amenable number.

21110223344 is an abundant number, since it is smaller than the sum of its proper divisors (27245714416).

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

21110223344 is a wasteful number, since it uses less digits than its factorization.

21110223344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6499497 (or 6499491 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21110223344 its reverse (44332201112), we get a palindrome (65442424456).

The spelling of 21110223344 in words is "twenty-one billion, one hundred ten million, two hundred twenty-three thousand, three hundred forty-four".