30413121021 has 6 divisors (see below), whose sum is σ = 43930063710. Its totient is φ = 20275414008.

The previous prime is 30413120987. The next prime is 30413121041. The reversal of 30413121021 is 12012131403.

30413121021 is a `hidden beast` number, since 304 + 131 + 210 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16825721796 + 13587399225 = 129714^2 + 116565^2 .

It is not a de Polignac number, because 30413121021 - 2⁷ = 30413120893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30413120985 and 30413121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30413121041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1689617826 + ... + 1689617843.

It is an arithmetic number, because the mean of its divisors is an integer number (7321677285).

Almost surely, 2^30413121021 is an apocalyptic number.

It is an amenable number.

30413121021 is a deficient number, since it is larger than the sum of its proper divisors (13516942689).

30413121021 is a wasteful number, since it uses less digits than its factorization.

30413121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379235675 (or 3379235672 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 30413121021 its reverse (12012131403), we get a palindrome (42425252424).

The spelling of 30413121021 in words is "thirty billion, four hundred thirteen million, one hundred twenty-one thousand, twenty-one".