22212111211001 has 2 divisors, whose sum is σ = 22212111211002. Its totient is φ = 22212111211000.

The previous prime is 22212111210997. The next prime is 22212111211007. The reversal of 22212111211001 is 10011211121222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15683984010601 + 6528127200400 = 3960301^2 + 2555020^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212111211001 - 2² = 22212111210997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22212111211007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106055605500 + 11106055605501.

It is an arithmetic number, because the mean of its divisors is an integer number (11106055605501).

Almost surely, 2^{22212111211001} is an apocalyptic number.

It is an amenable number.

22212111211001 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212111211001 is an equidigital number, since it uses as much as digits as its factorization.

22212111211001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 22212111211001 its reverse (10011211121222), we get a palindrome (32223322332223).

The spelling of 22212111211001 in words is "twenty-two trillion, two hundred twelve billion, one hundred eleven million, two hundred eleven thousand, one".