22221201212011 has 4 divisors (see below), whose sum is σ = 22241238364800. Its totient is φ = 22201164059224.

The previous prime is 22221201211991. The next prime is 22221201212029. The reversal of 22221201212011 is 11021210212222.

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 22221201212011 - 2³⁷ = 22083762258539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22221201212011.

It is not an unprimeable number, because it can be changed into a prime (22221201242011) 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, 10018574731 + ... + 10018576948.

It is an arithmetic number, because the mean of its divisors is an integer number (5560309591200).

Almost surely, 2^{22221201212011} is an apocalyptic number.

22221201212011 is a deficient number, since it is larger than the sum of its proper divisors (20037152789).

22221201212011 is a wasteful number, since it uses less digits than its factorization.

22221201212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20037152788.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22221201212011 its reverse (11021210212222), we get a palindrome (33242411424233).

The spelling of 22221201212011 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred one million, two hundred twelve thousand, eleven".