30111220133 has 4 divisors (see below), whose sum is σ = 30147897228. Its totient is φ = 30074543040.

The previous prime is 30111220103. The next prime is 30111220147. The reversal of 30111220133 is 33102211103.

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 21555525124 + 8555695009 = 146818^2 + 92497^2 .

It is a cyclic number.

It is not a de Polignac number, because 30111220133 - 2¹⁰ = 30111219109 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 (30111220103) 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, 18337316 + ... + 18338957.

It is an arithmetic number, because the mean of its divisors is an integer number (7536974307).

Almost surely, 2^30111220133 is an apocalyptic number.

It is an amenable number.

30111220133 is a deficient number, since it is larger than the sum of its proper divisors (36677095).

30111220133 is an equidigital number, since it uses as much as digits as its factorization.

30111220133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36677094.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 30111220133 its reverse (33102211103), we get a palindrome (63213431236).

The spelling of 30111220133 in words is "thirty billion, one hundred eleven million, two hundred twenty thousand, one hundred thirty-three".