1213203011313 has 16 divisors (see below), whose sum is σ = 1673435664000. Its totient is φ = 780887923200.

The previous prime is 1213203011287. The next prime is 1213203011327. The reversal of 1213203011313 is 3131103023121.

It is a happy number.

It is not a de Polignac number, because 1213203011313 - 2⁶ = 1213203011249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213203011313.

It is not an unprimeable number, because it can be changed into a prime (1213203011353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2831788 + ... + 3231938.

It is an arithmetic number, because the mean of its divisors is an integer number (104589729000).

Almost surely, 2^{1213203011313} is an apocalyptic number.

It is an amenable number.

1213203011313 is a deficient number, since it is larger than the sum of its proper divisors (460232652687).

1213203011313 is a wasteful number, since it uses less digits than its factorization.

1213203011313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435032.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1213203011313 its reverse (3131103023121), we get a palindrome (4344306034434).

The spelling of 1213203011313 in words is "one trillion, two hundred thirteen billion, two hundred three million, eleven thousand, three hundred thirteen".