1213311320201 has 4 divisors (see below), whose sum is σ = 1215443678100. Its totient is φ = 1211178962304.

The previous prime is 1213311320197. The next prime is 1213311320237. The reversal of 1213311320201 is 1020231133121.

It is a happy number.

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 482587249225 + 730724070976 = 694685^2 + 854824^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213311320201 - 2² = 1213311320197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213311320251) 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, 1066178096 + ... + 1066179233.

It is an arithmetic number, because the mean of its divisors is an integer number (303860919525).

Almost surely, 2^{1213311320201} is an apocalyptic number.

It is an amenable number.

1213311320201 is a deficient number, since it is larger than the sum of its proper divisors (2132357899).

1213311320201 is an equidigital number, since it uses as much as digits as its factorization.

1213311320201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132357898.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1213311320201 its reverse (1020231133121), we get a palindrome (2233542453322).

The spelling of 1213311320201 in words is "one trillion, two hundred thirteen billion, three hundred eleven million, three hundred twenty thousand, two hundred one".