22121211011 has 4 divisors (see below), whose sum is σ = 22123361352. Its totient is φ = 22119060672.

The previous prime is 22121210999. The next prime is 22121211023. The reversal of 22121211011 is 11011212122.

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

It is an interprime number because it is at equal distance from previous prime (22121210999) and next prime (22121211023).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121211011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121211031) 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, 1059665 + ... + 1080338.

It is an arithmetic number, because the mean of its divisors is an integer number (5530840338).

Almost surely, 2^22121211011 is an apocalyptic number.

22121211011 is a deficient number, since it is larger than the sum of its proper divisors (2150341).

22121211011 is a wasteful number, since it uses less digits than its factorization.

22121211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150340.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 22121211011 its reverse (11011212122), we get a palindrome (33132423133).

The spelling of 22121211011 in words is "twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, eleven".