1213201002311 has 4 divisors (see below), whose sum is σ = 1213318377552. Its totient is φ = 1213083627072.

The previous prime is 1213201002269. The next prime is 1213201002317. The reversal of 1213201002311 is 1132001023121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213201002311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213201002311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213201002317) 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, 58672115 + ... + 58692788.

It is an arithmetic number, because the mean of its divisors is an integer number (303329594388).

Almost surely, 2^{1213201002311} is an apocalyptic number.

1213201002311 is a deficient number, since it is larger than the sum of its proper divisors (117375241).

1213201002311 is a wasteful number, since it uses less digits than its factorization.

1213201002311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117375240.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1213201002311 its reverse (1132001023121), we get a palindrome (2345202025432).

The spelling of 1213201002311 in words is "one trillion, two hundred thirteen billion, two hundred one million, two thousand, three hundred eleven".