1212233121013 has 4 divisors (see below), whose sum is σ = 1212274009260. Its totient is φ = 1212192232768.

The previous prime is 1212233121007. The next prime is 1212233121017. The reversal of 1212233121013 is 3101213322121.

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 248808423249 + 963424697764 = 498807^2 + 981542^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212233121013 - 2⁵ = 1212233120981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212233121017) 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, 20399620 + ... + 20458957.

It is an arithmetic number, because the mean of its divisors is an integer number (303068502315).

Almost surely, 2^{1212233121013} is an apocalyptic number.

It is an amenable number.

1212233121013 is a deficient number, since it is larger than the sum of its proper divisors (40888247).

1212233121013 is an equidigital number, since it uses as much as digits as its factorization.

1212233121013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40888246.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1212233121013 its reverse (3101213322121), we get a palindrome (4313446443134).

The spelling of 1212233121013 in words is "one trillion, two hundred twelve billion, two hundred thirty-three million, one hundred twenty-one thousand, thirteen".