20122212211 has 4 divisors (see below), whose sum is σ = 20122631872. Its totient is φ = 20121792552.

The previous prime is 20122212203. The next prime is 20122212233. The reversal of 20122212211 is 11221222102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11221222102 = 2 ⋅5610611051.

It is a cyclic number.

It is not a de Polignac number, because 20122212211 - 2³ = 20122212203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20122212241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127011 + ... + 237436.

It is an arithmetic number, because the mean of its divisors is an integer number (5030657968).

Almost surely, 2^20122212211 is an apocalyptic number.

20122212211 is a deficient number, since it is larger than the sum of its proper divisors (419661).

20122212211 is an equidigital number, since it uses as much as digits as its factorization.

20122212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419660.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20122212211 its reverse (11221222102), we get a palindrome (31343434313).

The spelling of 20122212211 in words is "twenty billion, one hundred twenty-two million, two hundred twelve thousand, two hundred eleven".