201144300021 has 24 divisors (see below), whose sum is σ = 341022000384. Its totient is φ = 111833123040.

The previous prime is 201144300013. The next prime is 201144300061. The reversal of 201144300021 is 120003441102.

201144300021 is a `hidden beast` number, since 201 + 1 + 443 + 0 + 0 + 0 + 21 = 666.

It is not a de Polignac number, because 201144300021 - 2³ = 201144300013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201144299967 and 201144300003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201144300011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43143165 + ... + 43147826.

It is an arithmetic number, because the mean of its divisors is an integer number (14209250016).

Almost surely, 2^201144300021 is an apocalyptic number.

201144300021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201144300021 is a deficient number, since it is larger than the sum of its proper divisors (139877700363).

201144300021 is a wasteful number, since it uses less digits than its factorization.

201144300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86291041 (or 86291038 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 201144300021 its reverse (120003441102), we get a palindrome (321147741123).

The spelling of 201144300021 in words is "two hundred one billion, one hundred forty-four million, three hundred thousand, twenty-one".