21110013321444 has 36 divisors (see below), whose sum is σ = 53376175842444. Its totient is φ = 7034725619712.

The previous prime is 21110013321409. The next prime is 21110013321479. The reversal of 21110013321444 is 44412331001112.

It is a happy number.

21110013321444 is a `hidden beast` number, since 211 + 1 + 0 + 0 + 1 + 3 + 3 + 2 + 1 + 444 = 666.

It is an interprime number because it is at equal distance from previous prime (21110013321409) and next prime (21110013321479).

It can be written as a sum of positive squares in 2 ways, for example, as 2548461032100 + 18561552289344 = 1596390^2 + 4308312^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80929957 + ... + 81190380.

It is an arithmetic number, because the mean of its divisors is an integer number (1482671551179).

Almost surely, 2^{21110013321444} is an apocalyptic number.

It is an amenable number.

21110013321444 is an abundant number, since it is smaller than the sum of its proper divisors (32266162521000).

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

21110013321444 is a wasteful number, since it uses less digits than its factorization.

21110013321444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162123964 (or 162123959 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 21110013321444 its reverse (44412331001112), we get a palindrome (65522344322556).

The spelling of 21110013321444 in words is "twenty-one trillion, one hundred ten billion, thirteen million, three hundred twenty-one thousand, four hundred forty-four".