211001101210001 has 2 divisors, whose sum is σ = 211001101210002. Its totient is φ = 211001101210000.

The previous prime is 211001101209959. The next prime is 211001101210049. The reversal of 211001101210001 is 100012101100112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210999301414225 + 1799795776 = 14525815^2 + 42424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211001101210001 is a prime.

It is not a weakly prime, because it can be changed into another prime (211001106210001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105500550605000 + 105500550605001.

It is an arithmetic number, because the mean of its divisors is an integer number (105500550605001).

Almost surely, 2^{211001101210001} is an apocalyptic number.

It is an amenable number.

211001101210001 is a deficient number, since it is larger than the sum of its proper divisors (1).

211001101210001 is an equidigital number, since it uses as much as digits as its factorization.

211001101210001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 211001101210001 its reverse (100012101100112), we get a palindrome (311013202310113).

The spelling of 211001101210001 in words is "two hundred eleven trillion, one billion, one hundred one million, two hundred ten thousand, one".