21114213444 has 36 divisors (see below), whose sum is σ = 53377577344. Its totient is φ = 7037340912.

The previous prime is 21114213443. The next prime is 21114213451. The reversal of 21114213444 is 44431241112.

21114213444 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 4 + 213 + 444 = 666.

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

It is a super-2 number, since 2×21114213444² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21114213443) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 407829 + ... + 456675.

Almost surely, 2^21114213444 is an apocalyptic number.

It is an amenable number.

21114213444 is an abundant number, since it is smaller than the sum of its proper divisors (32263363900).

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

21114213444 is a wasteful number, since it uses less digits than its factorization.

21114213444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60864 (or 60859 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 21114213444 its reverse (44431241112), we get a palindrome (65545454556).

The spelling of 21114213444 in words is "twenty-one billion, one hundred fourteen million, two hundred thirteen thousand, four hundred forty-four".