213120220044 has 48 divisors (see below), whose sum is σ = 528489813600. Its totient is φ = 66612673536.

The previous prime is 213120220043. The next prime is 213120220051. The reversal of 213120220044 is 440022021312.

It is a self number, because there is not a number n which added to its sum of digits gives 213120220044.

It is not an unprimeable number, because it can be changed into a prime (213120220043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1886959 + ... + 1996710.

It is an arithmetic number, because the mean of its divisors is an integer number (11010204450).

Almost surely, 2^213120220044 is an apocalyptic number.

It is an amenable number.

213120220044 is an abundant number, since it is smaller than the sum of its proper divisors (315369593556).

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

213120220044 is a wasteful number, since it uses less digits than its factorization.

213120220044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883962 (or 3883960 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 213120220044 its reverse (440022021312), we get a palindrome (653142241356).

The spelling of 213120220044 in words is "two hundred thirteen billion, one hundred twenty million, two hundred twenty thousand, forty-four".