1211441113 has 4 divisors (see below), whose sum is σ = 1213757968. Its totient is φ = 1209124260.

The previous prime is 1211441093. The next prime is 1211441117. The reversal of 1211441113 is 3111441121.

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 a cyclic number.

It is not a de Polignac number, because 1211441113 - 2²⁹ = 674570201 is a prime.

It is a super-3 number, since 3×1211441113³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211441117) 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, 1157643 + ... + 1158688.

It is an arithmetic number, because the mean of its divisors is an integer number (303439492).

Almost surely, 2^1211441113 is an apocalyptic number.

It is an amenable number.

1211441113 is a deficient number, since it is larger than the sum of its proper divisors (2316855).

1211441113 is an equidigital number, since it uses as much as digits as its factorization.

1211441113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316854.

The product of its digits is 96, while the sum is 19.

The square root of 1211441113 is about 34805.7626406893. The cubic root of 1211441113 is about 1066.0251138971.

Adding to 1211441113 its reverse (3111441121), we get a palindrome (4322882234).

The spelling of 1211441113 in words is "one billion, two hundred eleven million, four hundred forty-one thousand, one hundred thirteen".