201021310221 has 32 divisors (see below), whose sum is σ = 286573324800. Its totient is φ = 124966670400.

The previous prime is 201021310211. The next prime is 201021310229. The reversal of 201021310221 is 122013120102.

It is not a de Polignac number, because 201021310221 - 2²¹ = 201019213069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201021310221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021310229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4948290 + ... + 4988748.

It is an arithmetic number, because the mean of its divisors is an integer number (8955416400).

Almost surely, 2^201021310221 is an apocalyptic number.

It is an amenable number.

201021310221 is a deficient number, since it is larger than the sum of its proper divisors (85552014579).

201021310221 is a wasteful number, since it uses less digits than its factorization.

201021310221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41849.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 201021310221 its reverse (122013120102), we get a palindrome (323034430323).

The spelling of 201021310221 in words is "two hundred one billion, twenty-one million, three hundred ten thousand, two hundred twenty-one".