211021122001 has 2 divisors, whose sum is σ = 211021122002. Its totient is φ = 211021122000.

The previous prime is 211021121999. The next prime is 211021122019. The reversal of 211021122001 is 100221120112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132059560000 + 78961562001 = 363400^2 + 281001^2 .

It is a cyclic number.

It is not a de Polignac number, because 211021122001 - 2¹ = 211021121999 is a prime.

Together with 211021121999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (211021122071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105510561000 + 105510561001.

It is an arithmetic number, because the mean of its divisors is an integer number (105510561001).

Almost surely, 2^211021122001 is an apocalyptic number.

It is an amenable number.

211021122001 is a deficient number, since it is larger than the sum of its proper divisors (1).

211021122001 is an equidigital number, since it uses as much as digits as its factorization.

211021122001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211021122001 its reverse (100221120112), we get a palindrome (311242242113).

The spelling of 211021122001 in words is "two hundred eleven billion, twenty-one million, one hundred twenty-two thousand, one".