30221230121 has 32 divisors (see below), whose sum is σ = 34587648000. Its totient is φ = 26253469440.

The previous prime is 30221230031. The next prime is 30221230129. The reversal of 30221230121 is 12103212203.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30221230121 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 30221230121.

It is not an unprimeable number, because it can be changed into a prime (30221230129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1439105 + ... + 1459953.

It is an arithmetic number, because the mean of its divisors is an integer number (1080864000).

Almost surely, 2^30221230121 is an apocalyptic number.

30221230121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30221230121 is a deficient number, since it is larger than the sum of its proper divisors (4366417879).

30221230121 is a wasteful number, since it uses less digits than its factorization.

30221230121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21029.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 30221230121 its reverse (12103212203), we get a palindrome (42324442324).

The spelling of 30221230121 in words is "thirty billion, two hundred twenty-one million, two hundred thirty thousand, one hundred twenty-one".