30221320123 has 4 divisors (see below), whose sum is σ = 31263434640. Its totient is φ = 29179205608.

The previous prime is 30221320099. The next prime is 30221320133. The reversal of 30221320123 is 32102312203.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30221320123 - 2¹³ = 30221311931 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30221320123.

It is not an unprimeable number, because it can be changed into a prime (30221320133) 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, 521057215 + ... + 521057272.

It is an arithmetic number, because the mean of its divisors is an integer number (7815858660).

Almost surely, 2^30221320123 is an apocalyptic number.

30221320123 is a deficient number, since it is larger than the sum of its proper divisors (1042114517).

30221320123 is a wasteful number, since it uses less digits than its factorization.

30221320123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042114516.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 30221320123 its reverse (32102312203), we get a palindrome (62323632326).

The spelling of 30221320123 in words is "thirty billion, two hundred twenty-one million, three hundred twenty thousand, one hundred twenty-three".