1212421203313 has 4 divisors (see below), whose sum is σ = 1214544533488. Its totient is φ = 1210297873140.

The previous prime is 1212421203299. The next prime is 1212421203341. The reversal of 1212421203313 is 3133021242121.

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 not a de Polignac number, because 1212421203313 - 2⁹ = 1212421202801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212421203013) 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, 1061664231 + ... + 1061665372.

It is an arithmetic number, because the mean of its divisors is an integer number (303636133372).

Almost surely, 2^{1212421203313} is an apocalyptic number.

It is an amenable number.

1212421203313 is a deficient number, since it is larger than the sum of its proper divisors (2123330175).

1212421203313 is an equidigital number, since it uses as much as digits as its factorization.

1212421203313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123330174.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1212421203313 its reverse (3133021242121), we get a palindrome (4345442445434).

The spelling of 1212421203313 in words is "one trillion, two hundred twelve billion, four hundred twenty-one million, two hundred three thousand, three hundred thirteen".