30123002021 has 8 divisors (see below), whose sum is σ = 36238198080. Its totient is φ = 24460783488.

The previous prime is 30123001991. The next prime is 30123002023. The reversal of 30123002021 is 12020032103.

It is a happy number.

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 30123002021 - 2¹⁰ = 30123000997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30123001987 and 30123002005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30123002023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113244236 + ... + 113244501.

It is an arithmetic number, because the mean of its divisors is an integer number (4529774760).

Almost surely, 2^30123002021 is an apocalyptic number.

It is an amenable number.

30123002021 is a deficient number, since it is larger than the sum of its proper divisors (6115196059).

30123002021 is a wasteful number, since it uses less digits than its factorization.

30123002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226488763.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 30123002021 its reverse (12020032103), we get a palindrome (42143034124).

The spelling of 30123002021 in words is "thirty billion, one hundred twenty-three million, two thousand, twenty-one".