213221242044 has 36 divisors (see below), whose sum is σ = 539081795616. Its totient is φ = 71059785408.

The previous prime is 213221242019. The next prime is 213221242057. The reversal of 213221242044 is 440242122312.

It is a happy number.

213221242044 is a `hidden beast` number, since 2 + 13 + 221 + 2 + 420 + 4 + 4 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 213221241999 and 213221242017.

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, 395124 + ... + 763259.

Almost surely, 2^213221242044 is an apocalyptic number.

It is an amenable number.

213221242044 is an abundant number, since it is smaller than the sum of its proper divisors (325860553572).

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

213221242044 is a wasteful number, since it uses less digits than its factorization.

213221242044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163506 (or 1163501 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 213221242044 its reverse (440242122312), we get a palindrome (653463364356).

The spelling of 213221242044 in words is "two hundred thirteen billion, two hundred twenty-one million, two hundred forty-two thousand, forty-four".