30131121220211 has 4 divisors (see below), whose sum is σ = 32870314058424. Its totient is φ = 27391928382000.

The previous prime is 30131121220171. The next prime is 30131121220237. The reversal of 30131121220211 is 11202212113103.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30131121220211 - 2¹⁸ = 30131120958067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30131121225211) 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, 1369596419090 + ... + 1369596419111.

It is an arithmetic number, because the mean of its divisors is an integer number (8217578514606).

Almost surely, 2^{30131121220211} is an apocalyptic number.

30131121220211 is a deficient number, since it is larger than the sum of its proper divisors (2739192838213).

30131121220211 is a wasteful number, since it uses less digits than its factorization.

30131121220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739192838212.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 30131121220211 its reverse (11202212113103), we get a palindrome (41333333333314).

The spelling of 30131121220211 in words is "thirty trillion, one hundred thirty-one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred eleven".