1211434013 has 4 divisors (see below), whose sum is σ = 1211630880. Its totient is φ = 1211237148.

The previous prime is 1211434001. The next prime is 1211434031. The reversal of 1211434013 is 3104341121.

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 1211434013 - 2⁸ = 1211433757 is a prime.

It is a super-3 number, since 3×1211434013³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211434043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88895 + ... + 101612.

It is an arithmetic number, because the mean of its divisors is an integer number (302907720).

Almost surely, 2^1211434013 is an apocalyptic number.

It is an amenable number.

1211434013 is a deficient number, since it is larger than the sum of its proper divisors (196867).

1211434013 is an equidigital number, since it uses as much as digits as its factorization.

1211434013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196866.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1211434013 is about 34805.6606459352. The cubic root of 1211434013 is about 1066.0230313105.

Adding to 1211434013 its reverse (3104341121), we get a palindrome (4315775134).

The spelling of 1211434013 in words is "one billion, two hundred eleven million, four hundred thirty-four thousand, thirteen".