1321118161231 has 12 divisors (see below), whose sum is σ = 1460833604496. Its totient is φ = 1193824776320.

The previous prime is 1321118161229. The next prime is 1321118161283. The reversal of 1321118161231 is 1321618111231.

It is a happy number.

It is not a de Polignac number, because 1321118161231 - 2¹ = 1321118161229 is a prime.

It is a super-2 number, since 2×1321118161231² (a number of 25 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 = 1321118161193 and 1321118161202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321118161211) 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, 32669410 + ... + 32709823.

It is an arithmetic number, because the mean of its divisors is an integer number (121736133708).

Almost surely, 2^{1321118161231} is an apocalyptic number.

1321118161231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1321118161231 is a deficient number, since it is larger than the sum of its proper divisors (139715443265).

1321118161231 is a wasteful number, since it uses less digits than its factorization.

1321118161231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65379422 (or 65379411 counting only the distinct ones).

The product of its digits is 1728, while the sum is 31.

The spelling of 1321118161231 in words is "one trillion, three hundred twenty-one billion, one hundred eighteen million, one hundred sixty-one thousand, two hundred thirty-one".