1213313111201 has 4 divisors (see below), whose sum is σ = 1225326112404. Its totient is φ = 1201300110000.

The previous prime is 1213313111159. The next prime is 1213313111203. The reversal of 1213313111201 is 1021113133121.

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 949307256976 + 264005854225 = 974324^2 + 513815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213313111201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213313111203) 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, 6006500450 + ... + 6006500651.

It is an arithmetic number, because the mean of its divisors is an integer number (306331528101).

Almost surely, 2^{1213313111201} is an apocalyptic number.

It is an amenable number.

1213313111201 is a deficient number, since it is larger than the sum of its proper divisors (12013001203).

1213313111201 is a wasteful number, since it uses less digits than its factorization.

1213313111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12013001202.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1213313111201 its reverse (1021113133121), we get a palindrome (2234426244322).

The spelling of 1213313111201 in words is "one trillion, two hundred thirteen billion, three hundred thirteen million, one hundred eleven thousand, two hundred one".