20122100221211 has 4 divisors (see below), whose sum is σ = 20122185239232. Its totient is φ = 20122015203192.

The previous prime is 20122100221183. The next prime is 20122100221297. The reversal of 20122100221211 is 11212200122102.

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 20122100221211 - 2¹⁸ = 20122099959067 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 20122100221211.

It is not an unprimeable number, because it can be changed into a prime (20122100721211) 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, 42152996 + ... + 42627681.

It is an arithmetic number, because the mean of its divisors is an integer number (5030546309808).

Almost surely, 2^{20122100221211} is an apocalyptic number.

20122100221211 is a deficient number, since it is larger than the sum of its proper divisors (85018021).

20122100221211 is an equidigital number, since it uses as much as digits as its factorization.

20122100221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85018020.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20122100221211 its reverse (11212200122102), we get a palindrome (31334300343313).

The spelling of 20122100221211 in words is "twenty trillion, one hundred twenty-two billion, one hundred million, two hundred twenty-one thousand, two hundred eleven".