30185240121 has 27 divisors (see below), whose sum is σ = 45178849261. Its totient is φ = 19419850464.

The previous prime is 30185240077. The next prime is 30185240153. The reversal of 30185240121 is 12104258103.

The square root of 30185240121 is 173739.

It is a perfect power (a square), and thus also a powerful number.

30185240121 is a `hidden beast` number, since 3 + 0 + 18 + 524 + 0 + 121 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9697325625 + 20487914496 = 98475^2 + 143136^2 .

It is not a de Polignac number, because 30185240121 - 2¹¹ = 30185238073 is a prime.

It is a super-2 number, since 2×30185240121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30185240821) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 15114295 + ... + 15116291.

Almost surely, 2^30185240121 is an apocalyptic number.

30185240121 is the 173739-th square number.

30185240121 is the 86870-th centered octagonal number.

It is an amenable number.

30185240121 is a deficient number, since it is larger than the sum of its proper divisors (14993609140).

30185240121 is an frugal number, since it uses more digits than its factorization.

30185240121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058 (or 2029 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

Adding to 30185240121 its reverse (12104258103), we get a palindrome (42289498224).

The spelling of 30185240121 in words is "thirty billion, one hundred eighty-five million, two hundred forty thousand, one hundred twenty-one".