21344311110 has 32 divisors (see below), whose sum is σ = 51255302112. Its totient is φ = 5688599040.

The previous prime is 21344311091. The next prime is 21344311111. The reversal of 21344311110 is 1111344312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344311111) by changing a digit.

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, 146881 + ... + 253500.

It is an arithmetic number, because the mean of its divisors is an integer number (1601728191).

Almost surely, 2^21344311110 is an apocalyptic number.

21344311110 is an abundant number, since it is smaller than the sum of its proper divisors (29910991002).

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

21344311110 is a wasteful number, since it uses less digits than its factorization.

21344311110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402168.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21344311110 its reverse (1111344312), we get a palindrome (22455655422).

The spelling of 21344311110 in words is "twenty-one billion, three hundred forty-four million, three hundred eleven thousand, one hundred ten".