211321011 has 32 divisors (see below), whose sum is σ = 316512000. Its totient is φ = 124300800.

The previous prime is 211321009. The next prime is 211321031. The reversal of 211321011 is 110123112.

It is not a de Polignac number, because 211321011 - 2¹ = 211321009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211321001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 423240 + ... + 423738.

It is an arithmetic number, because the mean of its divisors is an integer number (9891000).

Almost surely, 2^211321011 is an apocalyptic number.

211321011 is a deficient number, since it is larger than the sum of its proper divisors (105190989).

211321011 is a wasteful number, since it uses less digits than its factorization.

211321011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867.

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

The square root of 211321011 is about 14536.8845011577. The cubic root of 211321011 is about 595.6359380065.

Adding to 211321011 its reverse (110123112), we get a palindrome (321444123).

The spelling of 211321011 in words is "two hundred eleven million, three hundred twenty-one thousand, eleven".