1212013231133 has 4 divisors (see below), whose sum is σ = 1283308127100. Its totient is φ = 1140718335168.

The previous prime is 1212013231129. The next prime is 1212013231139. The reversal of 1212013231133 is 3311323102121.

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 1042251102649 + 169762128484 = 1020907^2 + 412022^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212013231133 - 2² = 1212013231129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1212013231099 and 1212013231108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212013231139) 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, 35647447958 + ... + 35647447991.

It is an arithmetic number, because the mean of its divisors is an integer number (320827031775).

Almost surely, 2^{1212013231133} is an apocalyptic number.

It is an amenable number.

1212013231133 is a deficient number, since it is larger than the sum of its proper divisors (71294895967).

1212013231133 is an equidigital number, since it uses as much as digits as its factorization.

1212013231133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71294895966.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1212013231133 its reverse (3311323102121), we get a palindrome (4523336333254).

The spelling of 1212013231133 in words is "one trillion, two hundred twelve billion, thirteen million, two hundred thirty-one thousand, one hundred thirty-three".