1123865108081 has 4 divisors (see below), whose sum is σ = 1124575068672. Its totient is φ = 1123155147492.

The previous prime is 1123865108057. The next prime is 1123865108083. The reversal of 1123865108081 is 1808015683211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123865108081 is a prime.

It is a super-2 number, since 2×1123865108081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123865108083) 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, 354977921 + ... + 354981086.

It is an arithmetic number, because the mean of its divisors is an integer number (281143767168).

Almost surely, 2^{1123865108081} is an apocalyptic number.

It is an amenable number.

1123865108081 is a deficient number, since it is larger than the sum of its proper divisors (709960591).

1123865108081 is an equidigital number, since it uses as much as digits as its factorization.

1123865108081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709960590.

The product of its (nonzero) digits is 92160, while the sum is 44.

The spelling of 1123865108081 in words is "one trillion, one hundred twenty-three billion, eight hundred sixty-five million, one hundred eight thousand, eighty-one".