211321330311 has 16 divisors (see below), whose sum is σ = 346783721984. Its totient is φ = 111466196064.

The previous prime is 211321330271. The next prime is 211321330331. The reversal of 211321330311 is 113033123112.

It is a happy number.

It is not a de Polignac number, because 211321330311 - 2⁶ = 211321330247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211321330331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387035131 + ... + 387035676.

It is an arithmetic number, because the mean of its divisors is an integer number (21673982624).

Almost surely, 2^211321330311 is an apocalyptic number.

211321330311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211321330311 is a deficient number, since it is larger than the sum of its proper divisors (135462391673).

211321330311 is a wasteful number, since it uses less digits than its factorization.

211321330311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774070830.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 211321330311 its reverse (113033123112), we get a palindrome (324354453423).

The spelling of 211321330311 in words is "two hundred eleven billion, three hundred twenty-one million, three hundred thirty thousand, three hundred eleven".