44213121 has 14 divisors (see below), whose sum is σ = 66290450. Its totient is φ = 29474928.

The previous prime is 44213119. The next prime is 44213131. The reversal of 44213121 is 12131244.

It can be written as a sum of positive squares in only one way, i.e., 43046721 + 1166400 = 6561^2 + 1080^2 .

It is not a de Polignac number, because 44213121 - 2¹ = 44213119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 44213094 and 44213103.

It is not an unprimeable number, because it can be changed into a prime (44213111) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 29596 + ... + 31053.

Almost surely, 2^44213121 is an apocalyptic number.

It is an amenable number.

44213121 is a deficient number, since it is larger than the sum of its proper divisors (22077329).

44213121 is an frugal number, since it uses more digits than its factorization.

44213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60667 (or 60652 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 44213121 is about 6649.2947746359. The cubic root of 44213121 is about 353.6039091767.

Adding to 44213121 its reverse (12131244), we get a palindrome (56344365).

The spelling of 44213121 in words is "forty-four million, two hundred thirteen thousand, one hundred twenty-one".