201323444421 has 16 divisors (see below), whose sum is σ = 308246423040. Its totient is φ = 115592407920.

The previous prime is 201323444353. The next prime is 201323444423. The reversal of 201323444421 is 124444323102.

It is not a de Polignac number, because 201323444421 - 2³⁵ = 166963706053 is a prime.

It is a super-2 number, since 2×201323444421² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201323444423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160544385 + ... + 160545638.

It is an arithmetic number, because the mean of its divisors is an integer number (19265401440).

Almost surely, 2^201323444421 is an apocalyptic number.

It is an amenable number.

201323444421 is a deficient number, since it is larger than the sum of its proper divisors (106922978619).

201323444421 is a wasteful number, since it uses less digits than its factorization.

201323444421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321090056.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 201323444421 its reverse (124444323102), we get a palindrome (325767767523).

The spelling of 201323444421 in words is "two hundred one billion, three hundred twenty-three million, four hundred forty-four thousand, four hundred twenty-one".