211321000001 has 4 divisors (see below), whose sum is σ = 211640699604. Its totient is φ = 211001300400.

The previous prime is 211320999961. The next prime is 211321000021. The reversal of 211321000001 is 100000123112.

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 161334772225 + 49986227776 = 401665^2 + 223576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211321000001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211321000021) 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, 159848810 + ... + 159850131.

It is an arithmetic number, because the mean of its divisors is an integer number (52910174901).

Almost surely, 2^211321000001 is an apocalyptic number.

It is an amenable number.

211321000001 is a deficient number, since it is larger than the sum of its proper divisors (319699603).

211321000001 is an equidigital number, since it uses as much as digits as its factorization.

211321000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319699602.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 211321000001 its reverse (100000123112), we get a palindrome (311321123113).

The spelling of 211321000001 in words is "two hundred eleven billion, three hundred twenty-one million, one", and thus it is an aban number.