1211133005 has 4 divisors (see below), whose sum is σ = 1453359612. Its totient is φ = 968906400.

The previous prime is 1211132987. The next prime is 1211133013. The reversal of 1211133005 is 5003311121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129117769 + 1082015236 = 11363^2 + 32894^2 .

It is not a de Polignac number, because 1211133005 - 2⁸ = 1211132749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121113296 + ... + 121113305.

It is an arithmetic number, because the mean of its divisors is an integer number (363339903).

Almost surely, 2^1211133005 is an apocalyptic number.

It is an amenable number.

1211133005 is a deficient number, since it is larger than the sum of its proper divisors (242226607).

1211133005 is an equidigital number, since it uses as much as digits as its factorization.

1211133005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242226606.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1211133005 is about 34801.3362530809. The cubic root of 1211133005 is about 1065.9347315386.

Adding to 1211133005 its reverse (5003311121), we get a palindrome (6214444126).

The spelling of 1211133005 in words is "one billion, two hundred eleven million, one hundred thirty-three thousand, five".