221022212311 has 4 divisors (see below), whose sum is σ = 221033371824. Its totient is φ = 221011052800.

The previous prime is 221022212303. The next prime is 221022212339. The reversal of 221022212311 is 113212220122.

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 221022212311 - 2³ = 221022212303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022212381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5549995 + ... + 5589676.

It is an arithmetic number, because the mean of its divisors is an integer number (55258342956).

Almost surely, 2^221022212311 is an apocalyptic number.

221022212311 is a deficient number, since it is larger than the sum of its proper divisors (11159513).

221022212311 is a wasteful number, since it uses less digits than its factorization.

221022212311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11159512.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221022212311 its reverse (113212220122), we get a palindrome (334234432433).

The spelling of 221022212311 in words is "two hundred twenty-one billion, twenty-two million, two hundred twelve thousand, three hundred eleven".