30402125121 has 32 divisors (see below), whose sum is σ = 42669462528. Its totient is φ = 19217232320.

The previous prime is 30402125119. The next prime is 30402125123. The reversal of 30402125121 is 12152120403.

It is an interprime number because it is at equal distance from previous prime (30402125119) and next prime (30402125123).

It is not a de Polignac number, because 30402125121 - 2¹ = 30402125119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30402125123) 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, 12897475 + ... + 12899831.

It is an arithmetic number, because the mean of its divisors is an integer number (1333420704).

Almost surely, 2^30402125121 is an apocalyptic number.

It is an amenable number.

30402125121 is a deficient number, since it is larger than the sum of its proper divisors (12267337407).

30402125121 is a wasteful number, since it uses less digits than its factorization.

30402125121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3941.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 30402125121 its reverse (12152120403), we get a palindrome (42554245524).

The spelling of 30402125121 in words is "thirty billion, four hundred two million, one hundred twenty-five thousand, one hundred twenty-one".