2113111020131 has 4 divisors (see below), whose sum is σ = 2237411668392. Its totient is φ = 1988810371872.

The previous prime is 2113111020109. The next prime is 2113111020149. The reversal of 2113111020131 is 1310201113112.

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-2113111020131 is a prime.

It is a super-2 number, since 2×2113111020131² (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), and also a Moran number because the ratio is a prime number: 124300648243 = 2113111020131 / (2 + 1 + 1 + 3 + 1 + 1 + 1 + 0 + 2 + 0 + 1 + 3 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2113111020151) 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, 62150324105 + ... + 62150324138.

It is an arithmetic number, because the mean of its divisors is an integer number (559352917098).

Almost surely, 2^{2113111020131} is an apocalyptic number.

2113111020131 is a deficient number, since it is larger than the sum of its proper divisors (124300648261).

2113111020131 is a wasteful number, since it uses less digits than its factorization.

2113111020131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124300648260.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 2113111020131 its reverse (1310201113112), we get a palindrome (3423312133243).

The spelling of 2113111020131 in words is "two trillion, one hundred thirteen billion, one hundred eleven million, twenty thousand, one hundred thirty-one".