221013233403444 has 36 divisors (see below), whose sum is σ = 558738323086944. Its totient is φ = 73662376733712.

The previous prime is 221013233403437. The next prime is 221013233403563. The reversal of 221013233403444 is 444304332310122.

221013233403444 is a `hidden beast` number, since 2 + 2 + 1 + 0 + 13 + 233 + 403 + 4 + 4 + 4 = 666.

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

It is a super-2 number, since 2×221013233403444² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 221013233403399 and 221013233403408.

It is a congruent number.

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, 362235432 + ... + 362845055.

Almost surely, 2^{221013233403444} is an apocalyptic number.

It is an amenable number.

221013233403444 is an abundant number, since it is smaller than the sum of its proper divisors (337725089683500).

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

221013233403444 is a wasteful number, since it uses less digits than its factorization.

221013233403444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725088964 (or 725088959 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 36.

Adding to 221013233403444 its reverse (444304332310122), we get a palindrome (665317565713566).

The spelling of 221013233403444 in words is "two hundred twenty-one trillion, thirteen billion, two hundred thirty-three million, four hundred three thousand, four hundred forty-four".