30121101 has 12 divisors (see below), whose sum is σ = 44569980. Its totient is φ = 19590720.

The previous prime is 30121097. The next prime is 30121151. The reversal of 30121101 is 10112103.

It can be written as a sum of positive squares in 2 ways, for example, as 10989225 + 19131876 = 3315^2 + 4374^2 .

It is not a de Polignac number, because 30121101 - 2² = 30121097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40446 + ... + 41183.

It is an arithmetic number, because the mean of its divisors is an integer number (3714165).

Almost surely, 2^30121101 is an apocalyptic number.

It is an amenable number.

30121101 is a deficient number, since it is larger than the sum of its proper divisors (14448879).

30121101 is a wasteful number, since it uses less digits than its factorization.

30121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81676 (or 81673 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 30121101 is about 5488.2693993644. The cubic root of 30121101 is about 311.1407881223.

Adding to 30121101 its reverse (10112103), we get a palindrome (40233204).

The spelling of 30121101 in words is "thirty million, one hundred twenty-one thousand, one hundred one".