1220313133121 has 4 divisors (see below), whose sum is σ = 1222199243712. Its totient is φ = 1218427022532.

The previous prime is 1220313133099. The next prime is 1220313133189. The reversal of 1220313133121 is 1213313130221.

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-1220313133121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220313133421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943054325 + ... + 943055618.

It is an arithmetic number, because the mean of its divisors is an integer number (305549810928).

Almost surely, 2^{1220313133121} is an apocalyptic number.

It is an amenable number.

1220313133121 is a deficient number, since it is larger than the sum of its proper divisors (1886110591).

1220313133121 is an equidigital number, since it uses as much as digits as its factorization.

1220313133121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886110590.

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

Adding to 1220313133121 its reverse (1213313130221), we get a palindrome (2433626263342).

The spelling of 1220313133121 in words is "one trillion, two hundred twenty billion, three hundred thirteen million, one hundred thirty-three thousand, one hundred twenty-one".