30221220122121 has 96 divisors (see below), whose sum is σ = 49751216064000. Its totient is φ = 16214091231744.

The previous prime is 30221220122111. The next prime is 30221220122123. The reversal of 30221220122121 is 12122102212203.

It is not a de Polignac number, because 30221220122121 - 2⁵ = 30221220122089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30221220122123) 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 95 ways as a sum of consecutive naturals, for example, 4872029806 + ... + 4872036008.

It is an arithmetic number, because the mean of its divisors is an integer number (518241834000).

Almost surely, 2^{30221220122121} is an apocalyptic number.

It is an amenable number.

30221220122121 is a deficient number, since it is larger than the sum of its proper divisors (19529995941879).

30221220122121 is a wasteful number, since it uses less digits than its factorization.

30221220122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10643 (or 10636 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 30221220122121 its reverse (12122102212203), we get a palindrome (42343322334324).

The spelling of 30221220122121 in words is "thirty trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty-one".