1091221319513 has 16 divisors (see below), whose sum is σ = 1237344971520. Its totient is φ = 954009570816.

The previous prime is 1091221319509. The next prime is 1091221319543. The reversal of 1091221319513 is 3159131221901.

It is a cyclic number.

It is not a de Polignac number, because 1091221319513 - 2² = 1091221319509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091221319543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327881 + ... + 1513257.

It is an arithmetic number, because the mean of its divisors is an integer number (77334060720).

Almost surely, 2^{1091221319513} is an apocalyptic number.

1091221319513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1091221319513 is a deficient number, since it is larger than the sum of its proper divisors (146123652007).

1091221319513 is a wasteful number, since it uses less digits than its factorization.

1091221319513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189136.

The product of its (nonzero) digits is 14580, while the sum is 38.

The spelling of 1091221319513 in words is "one trillion, ninety-one billion, two hundred twenty-one million, three hundred nineteen thousand, five hundred thirteen".