211013321 has 4 divisors (see below), whose sum is σ = 211299600. Its totient is φ = 210727044.

The previous prime is 211013317. The next prime is 211013329. The reversal of 211013321 is 123310112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211013321 - 2² = 211013317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211013296 and 211013305.

It is not an unprimeable number, because it can be changed into a prime (211013329) 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, 142031 + ... + 143508.

It is an arithmetic number, because the mean of its divisors is an integer number (52824900).

Almost surely, 2^211013321 is an apocalyptic number.

It is an amenable number.

211013321 is a deficient number, since it is larger than the sum of its proper divisors (286279).

211013321 is an equidigital number, since it uses as much as digits as its factorization.

211013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286278.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 211013321 is about 14526.2975668269. The cubic root of 211013321 is about 595.3467094020.

Adding to 211013321 its reverse (123310112), we get a palindrome (334323433).

The spelling of 211013321 in words is "two hundred eleven million, thirteen thousand, three hundred twenty-one".