201013311321221 has 4 divisors (see below), whose sum is σ = 229729498652832. Its totient is φ = 172297123989612.

The previous prime is 201013311321197. The next prime is 201013311321257. The reversal of 201013311321221 is 122123113310102.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-201013311321221 is a prime.

It is a super-2 number, since 2×201013311321221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201013311321281) 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, 14358093665795 + ... + 14358093665808.

It is an arithmetic number, because the mean of its divisors is an integer number (57432374663208).

Almost surely, 2^{201013311321221} is an apocalyptic number.

It is an amenable number.

201013311321221 is a deficient number, since it is larger than the sum of its proper divisors (28716187331611).

201013311321221 is an equidigital number, since it uses as much as digits as its factorization.

201013311321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28716187331610.

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

Adding to 201013311321221 its reverse (122123113310102), we get a palindrome (323136424631323).

The spelling of 201013311321221 in words is "two hundred one trillion, thirteen billion, three hundred eleven million, three hundred twenty-one thousand, two hundred twenty-one".