1211233005 has 24 divisors (see below), whose sum is σ = 2144143872. Its totient is φ = 632245344.

The previous prime is 1211232991. The next prime is 1211233039. The reversal of 1211233005 is 5003321121.

It is not a de Polignac number, because 1211233005 - 2⁴ = 1211232989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284229 + ... + 288458.

It is an arithmetic number, because the mean of its divisors is an integer number (89339328).

Almost surely, 2^1211233005 is an apocalyptic number.

1211233005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1211233005 is a deficient number, since it is larger than the sum of its proper divisors (932910867).

1211233005 is a wasteful number, since it uses less digits than its factorization.

1211233005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572745 (or 572742 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1211233005 is about 34802.7729498671. The cubic root of 1211233005 is about 1065.9640678540.

Adding to 1211233005 its reverse (5003321121), we get a palindrome (6214554126).

The spelling of 1211233005 in words is "one billion, two hundred eleven million, two hundred thirty-three thousand, five".