1111111113131 has 8 divisors (see below), whose sum is σ = 1176862932000. Its totient is φ = 1045402887808.

The previous prime is 1111111113121. The next prime is 1111111113313. The reversal of 1111111113131 is 1313111111111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1111111113131 - 2²⁶ = 1111044004267 is a prime.

It is a super-2 number, since 2×1111111113131² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111111113121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10845896 + ... + 10947861.

It is an arithmetic number, because the mean of its divisors is an integer number (147107866500).

Almost surely, 2^{1111111113131} is an apocalyptic number.

1111111113131 is a deficient number, since it is larger than the sum of its proper divisors (65751818869).

1111111113131 is a wasteful number, since it uses less digits than its factorization.

1111111113131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21796773.

The product of its digits is 9, while the sum is 17.

Adding to 1111111113131 its reverse (1313111111111), we get a palindrome (2424222224242).

It can be divided in two parts, 11111111 and 13131, that multiplied together give a palindrome (145899998541).

The spelling of 1111111113131 in words is "one trillion, one hundred eleven billion, one hundred eleven million, one hundred thirteen thousand, one hundred thirty-one".