1121756853855 has 16 divisors (see below), whose sum is σ = 1957975599744. Its totient is φ = 543882110880.

The previous prime is 1121756853769. The next prime is 1121756853857. The reversal of 1121756853855 is 5583586571211.

It is a happy number.

It is not a de Polignac number, because 1121756853855 - 2⁷ = 1121756853727 is a prime.

It is a super-2 number, since 2×1121756853855² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121756853795 and 1121756853804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121756853857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3399263029 + ... + 3399263358.

It is an arithmetic number, because the mean of its divisors is an integer number (122373474984).

Almost surely, 2^{1121756853855} is an apocalyptic number.

1121756853855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1121756853855 is a deficient number, since it is larger than the sum of its proper divisors (836218745889).

1121756853855 is a wasteful number, since it uses less digits than its factorization.

1121756853855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6798526406.

The product of its digits is 10080000, while the sum is 57.

The spelling of 1121756853855 in words is "one trillion, one hundred twenty-one billion, seven hundred fifty-six million, eight hundred fifty-three thousand, eight hundred fifty-five".