30123137115 has 32 divisors (see below), whose sum is σ = 53562062400. Its totient is φ = 16062727680.

The previous prime is 30123137039. The next prime is 30123137119. The reversal of 30123137115 is 51173132103.

It is a happy number.

It is not a de Polignac number, because 30123137115 - 2¹³ = 30123128923 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (30123137119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 857721 + ... + 892149.

It is an arithmetic number, because the mean of its divisors is an integer number (1673814450).

Almost surely, 2^30123137115 is an apocalyptic number.

30123137115 is a deficient number, since it is larger than the sum of its proper divisors (23438925285).

30123137115 is a wasteful number, since it uses less digits than its factorization.

30123137115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40924 (or 40918 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

Adding to 30123137115 its reverse (51173132103), we get a palindrome (81296269218).

The spelling of 30123137115 in words is "thirty billion, one hundred twenty-three million, one hundred thirty-seven thousand, one hundred fifteen".