30111131301221 has 4 divisors (see below), whose sum is σ = 30310542766944. Its totient is φ = 29911719835500.

The previous prime is 30111131301211. The next prime is 30111131301299. The reversal of 30111131301221 is 12210313111103.

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 30111131301221 - 2⁶ = 30111131301157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30111131301193 and 30111131301202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30111131301211) 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, 99705732635 + ... + 99705732936.

It is an arithmetic number, because the mean of its divisors is an integer number (7577635691736).

Almost surely, 2^{30111131301221} is an apocalyptic number.

It is an amenable number.

30111131301221 is a deficient number, since it is larger than the sum of its proper divisors (199411465723).

30111131301221 is a wasteful number, since it uses less digits than its factorization.

30111131301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199411465722.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 30111131301221 its reverse (12210313111103), we get a palindrome (42321444412324).

The spelling of 30111131301221 in words is "thirty trillion, one hundred eleven billion, one hundred thirty-one million, three hundred one thousand, two hundred twenty-one".