30135223021 has 4 divisors (see below), whose sum is σ = 30241708192. Its totient is φ = 30028737852.

The previous prime is 30135222983. The next prime is 30135223033. The reversal of 30135223021 is 12032253103.

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 a de Polignac number, because none of the positive numbers 2^k-30135223021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30135222983 and 30135223001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30135223051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53242161 + ... + 53242726.

It is an arithmetic number, because the mean of its divisors is an integer number (7560427048).

Almost surely, 2^30135223021 is an apocalyptic number.

It is an amenable number.

30135223021 is a deficient number, since it is larger than the sum of its proper divisors (106485171).

30135223021 is a wasteful number, since it uses less digits than its factorization.

30135223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106485170.

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 30135223021 its reverse (12032253103), we get a palindrome (42167476124).

The spelling of 30135223021 in words is "thirty billion, one hundred thirty-five million, two hundred twenty-three thousand, twenty-one".