30121221233 has 4 divisors (see below), whose sum is σ = 30263976048. Its totient is φ = 29978466420.

The previous prime is 30121221173. The next prime is 30121221283. The reversal of 30121221233 is 33212212103.

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 not a de Polignac number, because 30121221233 - 2⁸ = 30121220977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30121221283) 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, 71377091 + ... + 71377512.

It is an arithmetic number, because the mean of its divisors is an integer number (7565994012).

Almost surely, 2^30121221233 is an apocalyptic number.

It is an amenable number.

30121221233 is a deficient number, since it is larger than the sum of its proper divisors (142754815).

30121221233 is a wasteful number, since it uses less digits than its factorization.

30121221233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142754814.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 30121221233 its reverse (33212212103), we get a palindrome (63333433336).

The spelling of 30121221233 in words is "thirty billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred thirty-three".