1131022123123 has 4 divisors (see below), whose sum is σ = 1133184689848. Its totient is φ = 1128859556400.

The previous prime is 1131022123111. The next prime is 1131022123129. The reversal of 1131022123123 is 3213212201311.

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-1131022123123 is a prime.

It is a super-2 number, since 2×1131022123123² (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 = 1131022123094 and 1131022123103.

It is not an unprimeable number, because it can be changed into a prime (1131022123129) 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, 1081282578 + ... + 1081283623.

It is an arithmetic number, because the mean of its divisors is an integer number (283296172462).

Almost surely, 2^{1131022123123} is an apocalyptic number.

1131022123123 is a deficient number, since it is larger than the sum of its proper divisors (2162566725).

1131022123123 is an equidigital number, since it uses as much as digits as its factorization.

1131022123123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162566724.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1131022123123 its reverse (3213212201311), we get a palindrome (4344234324434).

The spelling of 1131022123123 in words is "one trillion, one hundred thirty-one billion, twenty-two million, one hundred twenty-three thousand, one hundred twenty-three".