221031120211 has 4 divisors (see below), whose sum is σ = 241124858424. Its totient is φ = 200937382000.

The previous prime is 221031120197. The next prime is 221031120221. The reversal of 221031120211 is 112021130122.

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 221031120211 - 2¹¹ = 221031118163 is a prime.

It is a super-2 number, since 2×221031120211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221031120221) 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, 10046869090 + ... + 10046869111.

It is an arithmetic number, because the mean of its divisors is an integer number (60281214606).

Almost surely, 2^221031120211 is an apocalyptic number.

221031120211 is a deficient number, since it is larger than the sum of its proper divisors (20093738213).

221031120211 is a wasteful number, since it uses less digits than its factorization.

221031120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20093738212.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 221031120211 its reverse (112021130122), we get a palindrome (333052250333).

The spelling of 221031120211 in words is "two hundred twenty-one billion, thirty-one million, one hundred twenty thousand, two hundred eleven".