1213233332011 has 4 divisors (see below), whose sum is σ = 1213834837912. Its totient is φ = 1212631826112.

The previous prime is 1213233331963. The next prime is 1213233332021. The reversal of 1213233332011 is 1102333323121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213233332011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213233332021) 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, 300749925 + ... + 300753958.

It is an arithmetic number, because the mean of its divisors is an integer number (303458709478).

Almost surely, 2^{1213233332011} is an apocalyptic number.

1213233332011 is a deficient number, since it is larger than the sum of its proper divisors (601505901).

1213233332011 is an equidigital number, since it uses as much as digits as its factorization.

1213233332011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601505900.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 1213233332011 its reverse (1102333323121), we get a palindrome (2315566655132).

The spelling of 1213233332011 in words is "one trillion, two hundred thirteen billion, two hundred thirty-three million, three hundred thirty-two thousand, eleven".