1091214146161 has 4 divisors (see below), whose sum is σ = 1091216243952. Its totient is φ = 1091212048372.

The previous prime is 1091214146159. The next prime is 1091214146201. The reversal of 1091214146161 is 1616414121901.

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 1091214146161 - 2¹ = 1091214146159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1091214146161.

It is not an unprimeable number, because it can be changed into a prime (1091214146111) 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, 382410 + ... + 1525996.

It is an arithmetic number, because the mean of its divisors is an integer number (272804060988).

Almost surely, 2^{1091214146161} is an apocalyptic number.

It is an amenable number.

1091214146161 is a deficient number, since it is larger than the sum of its proper divisors (2097791).

1091214146161 is an equidigital number, since it uses as much as digits as its factorization.

1091214146161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097790.

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 1091214146161 in words is "one trillion, ninety-one billion, two hundred fourteen million, one hundred forty-six thousand, one hundred sixty-one".