211310123310221 has 8 divisors (see below), whose sum is σ = 227628724824984. Its totient is φ = 195000661316160.

The previous prime is 211310123310217. The next prime is 211310123310241. The reversal of 211310123310221 is 122013321013112.

It is a happy number.

211310123310221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2066087137321 + 209244036172900 = 1437389^2 + 14465270^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211310123310221 - 2² = 211310123310217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211310123310211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2284832150 + ... + 2284924631.

It is an arithmetic number, because the mean of its divisors is an integer number (28453590603123).

Almost surely, 2^{211310123310221} is an apocalyptic number.

It is an amenable number.

211310123310221 is a deficient number, since it is larger than the sum of its proper divisors (16318601514763).

211310123310221 is a wasteful number, since it uses less digits than its factorization.

211310123310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4569760351.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 211310123310221 its reverse (122013321013112), we get a palindrome (333323444323333).

The spelling of 211310123310221 in words is "two hundred eleven trillion, three hundred ten billion, one hundred twenty-three million, three hundred ten thousand, two hundred twenty-one".