11131313131 has 4 divisors (see below), whose sum is σ = 11139936664. Its totient is φ = 11122689600.

The previous prime is 11131313129. The next prime is 11131313173. The reversal of 11131313131 is 13131313111.

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

It is a cyclic number.

It is not a de Polignac number, because 11131313131 - 2¹ = 11131313129 is a prime.

It is a super-2 number, since 2×11131313131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11131313099 and 11131313108.

It is not an unprimeable number, because it can be changed into a prime (11131313101) 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, 4309830 + ... + 4312411.

It is an arithmetic number, because the mean of its divisors is an integer number (2784984166).

Almost surely, 2^11131313131 is an apocalyptic number.

11131313131 is a deficient number, since it is larger than the sum of its proper divisors (8623533).

11131313131 is an equidigital number, since it uses as much as digits as its factorization.

11131313131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8623532.

The product of its digits is 81, while the sum is 19.

Adding to 11131313131 its reverse (13131313111), we get a palindrome (24262626242).

It can be divided in two parts, 11 and 131313131, that multiplied together give a palindrome (1444444441).

The spelling of 11131313131 in words is "eleven billion, one hundred thirty-one million, three hundred thirteen thousand, one hundred thirty-one".