201310222021 has 4 divisors (see below), whose sum is σ = 201318386092. Its totient is φ = 201302057952.

The previous prime is 201310222013. The next prime is 201310222037. The reversal of 201310222021 is 120222013102.

It is a happy number.

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 51808132996 + 149502089025 = 227614^2 + 386655^2 .

It is a cyclic number.

It is not a de Polignac number, because 201310222021 - 2³ = 201310222013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201310221986 and 201310222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201310222051) 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, 4044936 + ... + 4094401.

It is an arithmetic number, because the mean of its divisors is an integer number (50329596523).

Almost surely, 2^201310222021 is an apocalyptic number.

It is an amenable number.

201310222021 is a deficient number, since it is larger than the sum of its proper divisors (8164071).

201310222021 is an equidigital number, since it uses as much as digits as its factorization.

201310222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8164070.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 201310222021 its reverse (120222013102), we get a palindrome (321532235123).

The spelling of 201310222021 in words is "two hundred one billion, three hundred ten million, two hundred twenty-two thousand, twenty-one".