11221161895918 has 32 divisors (see below), whose sum is σ = 18255031300800. Its totient is φ = 5142298598400.

The previous prime is 11221161895913. The next prime is 11221161895927. The reversal of 11221161895918 is 81959816112211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221161895913) 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, 9748143 + ... + 10838293.

It is an arithmetic number, because the mean of its divisors is an integer number (570469728150).

Almost surely, 2^{11221161895918} is an apocalyptic number.

11221161895918 is a deficient number, since it is larger than the sum of its proper divisors (7033869404882).

11221161895918 is a wasteful number, since it uses less digits than its factorization.

11221161895918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092972.

The product of its digits is 622080, while the sum is 55.

The spelling of 11221161895918 in words is "eleven trillion, two hundred twenty-one billion, one hundred sixty-one million, eight hundred ninety-five thousand, nine hundred eighteen".