30131155121 has 8 divisors (see below), whose sum is σ = 31188450600. Its totient is φ = 29075079040.

The previous prime is 30131155099. The next prime is 30131155123. The reversal of 30131155121 is 12155113103.

It can be written as a sum of positive squares in 4 ways, for example, as 305865121 + 29825290000 = 17489^2 + 172700^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30131155121 - 2³⁴ = 12951285937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30131155123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254420 + ... + 353541.

It is an arithmetic number, because the mean of its divisors is an integer number (3898556325).

Almost surely, 2^30131155121 is an apocalyptic number.

It is an amenable number.

30131155121 is a deficient number, since it is larger than the sum of its proper divisors (1057295479).

30131155121 is a wasteful number, since it uses less digits than its factorization.

30131155121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609699.

The product of its (nonzero) digits is 450, while the sum is 23.

Adding to 30131155121 its reverse (12155113103), we get a palindrome (42286268224).

The spelling of 30131155121 in words is "thirty billion, one hundred thirty-one million, one hundred fifty-five thousand, one hundred twenty-one".