441212121 has 72 divisors (see below), whose sum is σ = 774671040. Its totient is φ = 241061184.

The previous prime is 441212099. The next prime is 441212131. The reversal of 441212121 is 121212144.

441212121 is a `hidden beast` number, since 441 + 212 + 12 + 1 = 666.

It is not a de Polignac number, because 441212121 - 2¹³ = 441203929 is a prime.

441212121 is a modest number, since divided by 212121 gives 441 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 441212094 and 441212103.

It is not an unprimeable number, because it can be changed into a prime (441212131) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1004820 + ... + 1005258.

It is an arithmetic number, because the mean of its divisors is an integer number (10759320).

Almost surely, 2^441212121 is an apocalyptic number.

It is an amenable number.

441212121 is a deficient number, since it is larger than the sum of its proper divisors (333458919).

441212121 is a wasteful number, since it uses less digits than its factorization.

441212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 545 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 441212121 is about 21005.0498928234. The cubic root of 441212121 is about 761.2882818640.

Adding to 441212121 its reverse (121212144), we get a palindrome (562424265).

The spelling of 441212121 in words is "four hundred forty-one million, two hundred twelve thousand, one hundred twenty-one".