1200441121 has 6 divisors (see below), whose sum is σ = 1319493266. Its totient is φ = 1091310000.

The previous prime is 1200441119. The next prime is 1200441157. The reversal of 1200441121 is 1211440021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 964972096 + 235469025 = 31064^2 + 15345^2 .

It is not a de Polignac number, because 1200441121 - 2¹ = 1200441119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200441095 and 1200441104.

It is not an unprimeable number, because it can be changed into a prime (1200441101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4960380 + ... + 4960621.

Almost surely, 2^1200441121 is an apocalyptic number.

1200441121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200441121 is a deficient number, since it is larger than the sum of its proper divisors (119052145).

1200441121 is an equidigital number, since it uses as much as digits as its factorization.

1200441121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9921023 (or 9921012 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1200441121 is about 34647.3825995558. The cubic root of 1200441121 is about 1062.7887646225.

Adding to 1200441121 its reverse (1211440021), we get a palindrome (2411881142).

The spelling of 1200441121 in words is "one billion, two hundred million, four hundred forty-one thousand, one hundred twenty-one".