30540125220021 has 12 divisors (see below), whose sum is σ = 44123780381772. Its totient is φ = 20355345245376.

The previous prime is 30540125219957. The next prime is 30540125220029. The reversal of 30540125220021 is 12002252104503.

30540125220021 is a `hidden beast` number, since 3 + 0 + 5 + 401 + 2 + 52 + 200 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14141585880900 + 16398539339121 = 3760530^2 + 4049511^2 .

It is not a de Polignac number, because 30540125220021 - 2⁶ = 30540125219957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30540125220029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394812066 + ... + 394889411.

It is an arithmetic number, because the mean of its divisors is an integer number (3676981698481).

Almost surely, 2^{30540125220021} is an apocalyptic number.

It is an amenable number.

30540125220021 is a deficient number, since it is larger than the sum of its proper divisors (13583655161751).

30540125220021 is a wasteful number, since it uses less digits than its factorization.

30540125220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789705780 (or 789705777 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 30540125220021 its reverse (12002252104503), we get a palindrome (42542377324524).

The spelling of 30540125220021 in words is "thirty trillion, five hundred forty billion, one hundred twenty-five million, two hundred twenty thousand, twenty-one".