20212222111009 has 4 divisors (see below), whose sum is σ = 20273286226480. Its totient is φ = 20151157995540.

The previous prime is 20212222111007. The next prime is 20212222111049. The reversal of 20212222111009 is 90011122221202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20212222111009 - 2¹ = 20212222111007 is a prime.

It is a super-2 number, since 2×20212222111009² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212222111007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30532057239 + ... + 30532057900.

It is an arithmetic number, because the mean of its divisors is an integer number (5068321556620).

Almost surely, 2^{20212222111009} is an apocalyptic number.

It is an amenable number.

20212222111009 is a deficient number, since it is larger than the sum of its proper divisors (61064115471).

20212222111009 is an equidigital number, since it uses as much as digits as its factorization.

20212222111009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61064115470.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 20212222111009 in words is "twenty trillion, two hundred twelve billion, two hundred twenty-two million, one hundred eleven thousand, nine".