131111021101 has 2 divisors, whose sum is σ = 131111021102. Its totient is φ = 131111021100.

The previous prime is 131111021057. The next prime is 131111021189. The reversal of 131111021101 is 101120111131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119795593225 + 11315427876 = 346115^2 + 106374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131111021101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131111021191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65555510550 + 65555510551.

It is an arithmetic number, because the mean of its divisors is an integer number (65555510551).

Almost surely, 2^131111021101 is an apocalyptic number.

It is an amenable number.

131111021101 is a deficient number, since it is larger than the sum of its proper divisors (1).

131111021101 is an equidigital number, since it uses as much as digits as its factorization.

131111021101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 131111021101 its reverse (101120111131), we get a palindrome (232231132232).

The spelling of 131111021101 in words is "one hundred thirty-one billion, one hundred eleven million, twenty-one thousand, one hundred one".