30131210021 has 8 divisors (see below), whose sum is σ = 34600432800. Its totient is φ = 25950324240.

The previous prime is 30131210017. The next prime is 30131210063. The reversal of 30131210021 is 12001213103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30131210021 - 2² = 30131210017 is a prime.

It is a super-2 number, since 2×30131210021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30131209978 and 30131210005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30131210321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72084026 + ... + 72084443.

It is an arithmetic number, because the mean of its divisors is an integer number (4325054100).

Almost surely, 2^30131210021 is an apocalyptic number.

It is an amenable number.

30131210021 is a deficient number, since it is larger than the sum of its proper divisors (4469222779).

30131210021 is a wasteful number, since it uses less digits than its factorization.

30131210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144168499.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 30131210021 its reverse (12001213103), we get a palindrome (42132423124).

The spelling of 30131210021 in words is "thirty billion, one hundred thirty-one million, two hundred ten thousand, twenty-one".