1123868801781 has 96 divisors (see below), whose sum is σ = 1884307276800. Its totient is φ = 638756616960.

The previous prime is 1123868801771. The next prime is 1123868801813. The reversal of 1123868801781 is 1871088683211.

1123868801781 is a `hidden beast` number, since 1 + 12 + 386 + 8 + 80 + 178 + 1 = 666.

It is not a de Polignac number, because 1123868801781 - 2⁶ = 1123868801717 is a prime.

It is a super-2 number, since 2×1123868801781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123868801711) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 50904961 + ... + 50927033.

It is an arithmetic number, because the mean of its divisors is an integer number (19628200800).

Almost surely, 2^{1123868801781} is an apocalyptic number.

1123868801781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1123868801781 is a deficient number, since it is larger than the sum of its proper divisors (760438475019).

1123868801781 is a wasteful number, since it uses less digits than its factorization.

1123868801781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22551 (or 22548 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 54.

The spelling of 1123868801781 in words is "one trillion, one hundred twenty-three billion, eight hundred sixty-eight million, eight hundred one thousand, seven hundred eighty-one".