211311012001 has 2 divisors, whose sum is σ = 211311012002. Its totient is φ = 211311012000.

The previous prime is 211311011999. The next prime is 211311012071. The reversal of 211311012001 is 100210113112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142467747601 + 68843264400 = 377449^2 + 262380^2 .

It is a cyclic number.

It is not a de Polignac number, because 211311012001 - 2¹ = 211311011999 is a prime.

Together with 211311011999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (211311012071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105655506000 + 105655506001.

It is an arithmetic number, because the mean of its divisors is an integer number (105655506001).

Almost surely, 2^211311012001 is an apocalyptic number.

It is an amenable number.

211311012001 is a deficient number, since it is larger than the sum of its proper divisors (1).

211311012001 is an equidigital number, since it uses as much as digits as its factorization.

211311012001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 211311012001 its reverse (100210113112), we get a palindrome (311521125113).

The spelling of 211311012001 in words is "two hundred eleven billion, three hundred eleven million, twelve thousand, one".