30012124021 has 4 divisors (see below), whose sum is σ = 32740498944. Its totient is φ = 27283749100.

The previous prime is 30012123997. The next prime is 30012124033. The reversal of 30012124021 is 12042121003.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30012124021 - 2²³ = 30003735413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30012123986 and 30012124004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30012124061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1364187445 + ... + 1364187466.

It is an arithmetic number, because the mean of its divisors is an integer number (8185124736).

Almost surely, 2^30012124021 is an apocalyptic number.

It is an amenable number.

30012124021 is a deficient number, since it is larger than the sum of its proper divisors (2728374923).

30012124021 is a wasteful number, since it uses less digits than its factorization.

30012124021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728374922.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 30012124021 its reverse (12042121003), we get a palindrome (42054245024).

The spelling of 30012124021 in words is "thirty billion, twelve million, one hundred twenty-four thousand, twenty-one".