1211033213 has 12 divisors (see below), whose sum is σ = 1312417440. Its totient is φ = 1116971856.

The previous prime is 1211033149. The next prime is 1211033231. The reversal of 1211033213 is 3123301121.

It is not a de Polignac number, because 1211033213 - 2⁶ = 1211033149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211033191 and 1211033200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211030213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 299318 + ... + 303336.

It is an arithmetic number, because the mean of its divisors is an integer number (109368120).

Almost surely, 2^1211033213 is an apocalyptic number.

1211033213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1211033213 is a deficient number, since it is larger than the sum of its proper divisors (101384227).

1211033213 is a wasteful number, since it uses less digits than its factorization.

1211033213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5828 (or 5815 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1211033213 is about 34799.9024854956. The cubic root of 1211033213 is about 1065.9054546329.

Adding to 1211033213 its reverse (3123301121), we get a palindrome (4334334334).

The spelling of 1211033213 in words is "one billion, two hundred eleven million, thirty-three thousand, two hundred thirteen".