1131322455161 has 12 divisors (see below), whose sum is σ = 1138287869712. Its totient is φ = 1124399374896.

The previous prime is 1131322455149. The next prime is 1131322455181. The reversal of 1131322455161 is 1615542231311.

It is a happy number.

It is not a de Polignac number, because 1131322455161 - 2⁶ = 1131322455097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131322455181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134885810 + ... + 134894196.

It is an arithmetic number, because the mean of its divisors is an integer number (94857322476).

Almost surely, 2^{1131322455161} is an apocalyptic number.

It is an amenable number.

1131322455161 is a deficient number, since it is larger than the sum of its proper divisors (6965414551).

1131322455161 is an frugal number, since it uses more digits than its factorization.

1131322455161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13240 (or 13067 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

Adding to 1131322455161 its reverse (1615542231311), we get a palindrome (2746864686472).

The spelling of 1131322455161 in words is "one trillion, one hundred thirty-one billion, three hundred twenty-two million, four hundred fifty-five thousand, one hundred sixty-one".