30120033021 has 16 divisors (see below), whose sum is σ = 43342715136. Its totient is φ = 18495360576.

The previous prime is 30120033017. The next prime is 30120033023. The reversal of 30120033021 is 12033002103.

It is not a de Polignac number, because 30120033021 - 2² = 30120033017 is a prime.

It is a super-2 number, since 2×30120033021² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120033023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 815970 + ... + 852083.

It is an arithmetic number, because the mean of its divisors is an integer number (2708919696).

Almost surely, 2^30120033021 is an apocalyptic number.

It is an amenable number.

30120033021 is a deficient number, since it is larger than the sum of its proper divisors (13222682115).

30120033021 is a wasteful number, since it uses less digits than its factorization.

30120033021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668532.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 30120033021 its reverse (12033002103), we get a palindrome (42153035124).

The spelling of 30120033021 in words is "thirty billion, one hundred twenty million, thirty-three thousand, twenty-one".