30120120231 has 4 divisors (see below), whose sum is σ = 40160160312. Its totient is φ = 20080080152.

The previous prime is 30120120203. The next prime is 30120120263. The reversal of 30120120231 is 13202102103.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30120120231 - 2⁷ = 30120120103 is a prime.

It is a super-2 number, since 2×30120120231² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30120120231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120120131) 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, 5020020036 + ... + 5020020041.

It is an arithmetic number, because the mean of its divisors is an integer number (10040040078).

Almost surely, 2^30120120231 is an apocalyptic number.

30120120231 is a deficient number, since it is larger than the sum of its proper divisors (10040040081).

30120120231 is a wasteful number, since it uses less digits than its factorization.

30120120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10040040080.

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

Adding to 30120120231 its reverse (13202102103), we get a palindrome (43322222334).

The spelling of 30120120231 in words is "thirty billion, one hundred twenty million, one hundred twenty thousand, two hundred thirty-one".