1211340441 has 4 divisors (see below), whose sum is σ = 1615120592. Its totient is φ = 807560292.

The previous prime is 1211340439. The next prime is 1211340511. The reversal of 1211340441 is 1440431121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1211340441 - 2¹ = 1211340439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211348441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201890071 + ... + 201890076.

It is an arithmetic number, because the mean of its divisors is an integer number (403780148).

Almost surely, 2^1211340441 is an apocalyptic number.

It is an amenable number.

1211340441 is a deficient number, since it is larger than the sum of its proper divisors (403780151).

1211340441 is an equidigital number, since it uses as much as digits as its factorization.

1211340441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403780150.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1211340441 is about 34804.3164133416. The cubic root of 1211340441 is about 1065.9955838187.

Adding to 1211340441 its reverse (1440431121), we get a palindrome (2651771562).

The spelling of 1211340441 in words is "one billion, two hundred eleven million, three hundred forty thousand, four hundred forty-one".