1089726569121 has 4 divisors (see below), whose sum is σ = 1452968758832. Its totient is φ = 726484379412.

The previous prime is 1089726569089. The next prime is 1089726569123. The reversal of 1089726569121 is 1219656279801.

It is a happy number.

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 not a de Polignac number, because 1089726569121 - 2⁵ = 1089726569089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089726569123) 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 3 ways as a sum of consecutive naturals, for example, 181621094851 + ... + 181621094856.

It is an arithmetic number, because the mean of its divisors is an integer number (363242189708).

Almost surely, 2^{1089726569121} is an apocalyptic number.

It is an amenable number.

1089726569121 is a deficient number, since it is larger than the sum of its proper divisors (363242189711).

1089726569121 is an equidigital number, since it uses as much as digits as its factorization.

1089726569121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363242189710.

The product of its (nonzero) digits is 3265920, while the sum is 57.

The spelling of 1089726569121 in words is "one trillion, eighty-nine billion, seven hundred twenty-six million, five hundred sixty-nine thousand, one hundred twenty-one".