210211111001 has 2 divisors, whose sum is σ = 210211111002. Its totient is φ = 210211111000.

The previous prime is 210211110931. The next prime is 210211111009. The reversal of 210211111001 is 100111112012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206389398601 + 3821712400 = 454301^2 + 61820^2 .

It is a cyclic number.

It is not a de Polignac number, because 210211111001 - 2¹⁴ = 210211094617 is a prime.

It is a super-2 number, since 2×210211111001² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210211111009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105105555500 + 105105555501.

It is an arithmetic number, because the mean of its divisors is an integer number (105105555501).

Almost surely, 2^210211111001 is an apocalyptic number.

It is an amenable number.

210211111001 is a deficient number, since it is larger than the sum of its proper divisors (1).

210211111001 is an equidigital number, since it uses as much as digits as its factorization.

210211111001 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 210211111001 its reverse (100111112012), we get a palindrome (310322223013).

It can be divided in two parts, 2102111 and 11001, that added together give a palindrome (2113112).

The spelling of 210211111001 in words is "two hundred ten billion, two hundred eleven million, one hundred eleven thousand, one".