90112221109 has 4 divisors (see below), whose sum is σ = 91004421420. Its totient is φ = 89220020800.

The previous prime is 90112221103. The next prime is 90112221119.

90112221109 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62751753009 + 27360468100 = 250503^2 + 165410^2 .

It is a cyclic number.

It is not a de Polignac number, because 90112221109 - 2¹⁷ = 90112090037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90112221103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446100004 + ... + 446100205.

It is an arithmetic number, because the mean of its divisors is an integer number (22751105355).

Almost surely, 2^90112221109 is an apocalyptic number.

It is an amenable number.

90112221109 is a deficient number, since it is larger than the sum of its proper divisors (892200311).

90112221109 is a wasteful number, since it uses less digits than its factorization.

90112221109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892200310.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 90112221109 in words is "ninety billion, one hundred twelve million, two hundred twenty-one thousand, one hundred nine".