201113231131 has 4 divisors (see below), whose sum is σ = 202155268792. Its totient is φ = 200071193472.

The previous prime is 201113231107. The next prime is 201113231159. The reversal of 201113231131 is 131132311102.

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-201113231131 is a prime.

It is a super-2 number, since 2×201113231131² (a number of 23 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 = 201113231099 and 201113231108.

It is not an unprimeable number, because it can be changed into a prime (201113231171) 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, 521018541 + ... + 521018926.

It is an arithmetic number, because the mean of its divisors is an integer number (50538817198).

Almost surely, 2^201113231131 is an apocalyptic number.

201113231131 is a deficient number, since it is larger than the sum of its proper divisors (1042037661).

201113231131 is a wasteful number, since it uses less digits than its factorization.

201113231131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042037660.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 201113231131 its reverse (131132311102), we get a palindrome (332245542233).

The spelling of 201113231131 in words is "two hundred one billion, one hundred thirteen million, two hundred thirty-one thousand, one hundred thirty-one".