30011121121 has 4 divisors (see below), whose sum is σ = 30013551252. Its totient is φ = 30008690992.

The previous prime is 30011121079. The next prime is 30011121131. The reversal of 30011121121 is 12112111003.

It is a happy number.

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 12834397521 + 17176723600 = 113289^2 + 131060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30011121121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30011121131) 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, 1196446 + ... + 1221271.

It is an arithmetic number, because the mean of its divisors is an integer number (7503387813).

Almost surely, 2^30011121121 is an apocalyptic number.

It is an amenable number.

30011121121 is a deficient number, since it is larger than the sum of its proper divisors (2430131).

30011121121 is a wasteful number, since it uses less digits than its factorization.

30011121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430130.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 30011121121 its reverse (12112111003), we get a palindrome (42123232124).

The spelling of 30011121121 in words is "thirty billion, eleven million, one hundred twenty-one thousand, one hundred twenty-one".