211210210011001 has 4 divisors (see below), whose sum is σ = 211213098112932. Its totient is φ = 211207321909072.

The previous prime is 211210210010971. The next prime is 211210210011013. The reversal of 211210210011001 is 100110012012112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 111636235298025 + 99573974712976 = 10565805^2 + 9978676^2 .

It is a cyclic number.

It is not a de Polignac number, because 211210210011001 - 2¹¹ = 211210210008953 is a prime.

It is a super-2 number, since 2×211210210011001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211210210011041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1443941266 + ... + 1444087531.

It is an arithmetic number, because the mean of its divisors is an integer number (52803274528233).

Almost surely, 2^{211210210011001} is an apocalyptic number.

It is an amenable number.

211210210011001 is a deficient number, since it is larger than the sum of its proper divisors (2888101931).

211210210011001 is an equidigital number, since it uses as much as digits as its factorization.

211210210011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888101930.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211210210011001 its reverse (100110012012112), we get a palindrome (311320222023113).

The spelling of 211210210011001 in words is "two hundred eleven trillion, two hundred ten billion, two hundred ten million, eleven thousand, one".