30121212221321 has 8 divisors (see below), whose sum is σ = 32438284947264. Its totient is φ = 27804147552720.

The previous prime is 30121212221239. The next prime is 30121212221327. The reversal of 30121212221321 is 12312221212103.

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 30121212221321 - 2¹⁸ = 30121211959177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30121212221327) 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, 7368806 + ... + 10702416.

It is an arithmetic number, because the mean of its divisors is an integer number (4054785618408).

Almost surely, 2^{30121212221321} is an apocalyptic number.

It is an amenable number.

30121212221321 is a deficient number, since it is larger than the sum of its proper divisors (2317072725943).

30121212221321 is a wasteful number, since it uses less digits than its factorization.

30121212221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028671.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 30121212221321 its reverse (12312221212103), we get a palindrome (42433433433424).

The spelling of 30121212221321 in words is "thirty trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, three hundred twenty-one".