22031221011 has 16 divisors (see below), whose sum is σ = 30099573504. Its totient is φ = 14326117344.

The previous prime is 22031220997. The next prime is 22031221021. The reversal of 22031221011 is 11012213022.

It is not a de Polignac number, because 22031221011 - 2²¹ = 22029123859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22031221021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23676 + ... + 211241.

It is an arithmetic number, because the mean of its divisors is an integer number (1881223344).

Almost surely, 2^22031221011 is an apocalyptic number.

22031221011 is a deficient number, since it is larger than the sum of its proper divisors (8068352493).

22031221011 is a wasteful number, since it uses less digits than its factorization.

22031221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235690.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 22031221011 its reverse (11012213022), we get a palindrome (33043434033).

The spelling of 22031221011 in words is "twenty-two billion, thirty-one million, two hundred twenty-one thousand, eleven".