1313111321211 has 16 divisors (see below), whose sum is σ = 1844470275840. Its totient is φ = 828655308000.

The previous prime is 1313111321209. The next prime is 1313111321233. The reversal of 1313111321211 is 1121231113131.

It is not a de Polignac number, because 1313111321211 - 2¹ = 1313111321209 is a prime.

It is a super-2 number, since 2×1313111321211² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1313111321281) 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, 9348540 + ... + 9487961.

It is an arithmetic number, because the mean of its divisors is an integer number (115279392240).

Almost surely, 2^{1313111321211} is an apocalyptic number.

1313111321211 is a deficient number, since it is larger than the sum of its proper divisors (531358954629).

1313111321211 is a wasteful number, since it uses less digits than its factorization.

1313111321211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18837746.

The product of its digits is 108, while the sum is 21.

Adding to 1313111321211 its reverse (1121231113131), we get a palindrome (2434342434342).

The spelling of 1313111321211 in words is "one trillion, three hundred thirteen billion, one hundred eleven million, three hundred twenty-one thousand, two hundred eleven".