1212021120013 has 4 divisors (see below), whose sum is σ = 1322204858208. Its totient is φ = 1101837381820.

The previous prime is 1212021119989. The next prime is 1212021120031. The reversal of 1212021120013 is 3100211202121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212021120013 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 (1212021121013) 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 3 ways as a sum of consecutive naturals, for example, 55091869081 + ... + 55091869102.

It is an arithmetic number, because the mean of its divisors is an integer number (330551214552).

Almost surely, 2^{1212021120013} is an apocalyptic number.

It is an amenable number.

1212021120013 is a deficient number, since it is larger than the sum of its proper divisors (110183738195).

1212021120013 is a wasteful number, since it uses less digits than its factorization.

1212021120013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110183738194.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1212021120013 its reverse (3100211202121), we get a palindrome (4312232322134).

The spelling of 1212021120013 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred twenty thousand, thirteen".