30120320121 has 4 divisors (see below), whose sum is σ = 40160426832. Its totient is φ = 20080213412.

The previous prime is 30120320117. The next prime is 30120320143. The reversal of 30120320121 is 12102302103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30120320121 - 2² = 30120320117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30120320121.

It is not an unprimeable number, because it can be changed into a prime (30120320521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5020053351 + ... + 5020053356.

It is an arithmetic number, because the mean of its divisors is an integer number (10040106708).

Almost surely, 2^30120320121 is an apocalyptic number.

It is an amenable number.

30120320121 is a deficient number, since it is larger than the sum of its proper divisors (10040106711).

30120320121 is a wasteful number, since it uses less digits than its factorization.

30120320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10040106710.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 30120320121 its reverse (12102302103), we get a palindrome (42222622224).

It can be divided in two parts, 30120320 and 121, that added together give a triangular number (30120441 = T₇₇₆₁).

The spelling of 30120320121 in words is "thirty billion, one hundred twenty million, three hundred twenty thousand, one hundred twenty-one".