30123101 has 4 divisors (see below), whose sum is σ = 30135900. Its totient is φ = 30110304.

The previous prime is 30123097. The next prime is 30123109. The reversal of 30123101 is 10132103.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10719076 + 19404025 = 3274^2 + 4405^2 .

It is a cyclic number.

It is not a de Polignac number, because 30123101 - 2² = 30123097 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 (30123109) 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, 1736 + ... + 7953.

It is an arithmetic number, because the mean of its divisors is an integer number (7533975).

Almost surely, 2^30123101 is an apocalyptic number.

It is an amenable number.

30123101 is a deficient number, since it is larger than the sum of its proper divisors (12799).

30123101 is an equidigital number, since it uses as much as digits as its factorization.

30123101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12798.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 30123101 is about 5488.4516031391. The cubic root of 30123101 is about 311.1476744112.

Adding to 30123101 its reverse (10132103), we get a palindrome (40255204).

The spelling of 30123101 in words is "thirty million, one hundred twenty-three thousand, one hundred one".