30111322100221 has 4 divisors (see below), whose sum is σ = 30111346703772. Its totient is φ = 30111297496672.

The previous prime is 30111322100191. The next prime is 30111322100273. The reversal of 30111322100221 is 12200122311103.

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 25941603024100 + 4169719076121 = 5093290^2 + 2041989^2 .

It is a cyclic number.

It is not a de Polignac number, because 30111322100221 - 2⁹ = 30111322099709 is a prime.

It is a super-2 number, since 2×30111322100221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30111322100021) 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, 10364266 + ... + 12947611.

It is an arithmetic number, because the mean of its divisors is an integer number (7527836675943).

Almost surely, 2^{30111322100221} is an apocalyptic number.

It is an amenable number.

30111322100221 is a deficient number, since it is larger than the sum of its proper divisors (24603551).

30111322100221 is a wasteful number, since it uses less digits than its factorization.

30111322100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24603550.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 30111322100221 its reverse (12200122311103), we get a palindrome (42311444411324).

The spelling of 30111322100221 in words is "thirty trillion, one hundred eleven billion, three hundred twenty-two million, one hundred thousand, two hundred twenty-one".