30123020101 has 2 divisors, whose sum is σ = 30123020102. Its totient is φ = 30123020100.

The previous prime is 30123020047. The next prime is 30123020107. The reversal of 30123020101 is 10102032103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18387631201 + 11735388900 = 135601^2 + 108330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30123020101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30123020107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15061510050 + 15061510051.

It is an arithmetic number, because the mean of its divisors is an integer number (15061510051).

Almost surely, 2^30123020101 is an apocalyptic number.

It is an amenable number.

30123020101 is a deficient number, since it is larger than the sum of its proper divisors (1).

30123020101 is an equidigital number, since it uses as much as digits as its factorization.

30123020101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 30123020101 its reverse (10102032103), we get a palindrome (40225052204).

The spelling of 30123020101 in words is "thirty billion, one hundred twenty-three million, twenty thousand, one hundred one".