1090298128921 has 4 divisors (see below), whose sum is σ = 1090304914192. Its totient is φ = 1090291343652.

The previous prime is 1090298128919. The next prime is 1090298128949. The reversal of 1090298128921 is 1298218920901.

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 a cyclic number.

It is not a de Polignac number, because 1090298128921 - 2¹ = 1090298128919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1090298128021) 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, 3145611 + ... + 3474976.

It is an arithmetic number, because the mean of its divisors is an integer number (272576228548).

Almost surely, 2^{1090298128921} is an apocalyptic number.

It is an amenable number.

1090298128921 is a deficient number, since it is larger than the sum of its proper divisors (6785271).

1090298128921 is an equidigital number, since it uses as much as digits as its factorization.

1090298128921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6785270.

The product of its (nonzero) digits is 373248, while the sum is 52.

The spelling of 1090298128921 in words is "one trillion, ninety billion, two hundred ninety-eight million, one hundred twenty-eight thousand, nine hundred twenty-one".