20122100721211 has 2 divisors, whose sum is σ = 20122100721212. Its totient is φ = 20122100721210.

The previous prime is 20122100721181. The next prime is 20122100721253. The reversal of 20122100721211 is 11212700122102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20122100721211 - 2¹³ = 20122100713019 is a prime.

It is not a weakly prime, because it can be changed into another prime (20122100721511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061050360605 + 10061050360606.

It is an arithmetic number, because the mean of its divisors is an integer number (10061050360606).

Almost surely, 2^{20122100721211} is an apocalyptic number.

20122100721211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122100721211 is an equidigital number, since it uses as much as digits as its factorization.

20122100721211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 20122100721211 its reverse (11212700122102), we get a palindrome (31334800843313).

The spelling of 20122100721211 in words is "twenty trillion, one hundred twenty-two billion, one hundred million, seven hundred twenty-one thousand, two hundred eleven".