201100044421 has 2 divisors, whose sum is σ = 201100044422. Its totient is φ = 201100044420.

The previous prime is 201100044419. The next prime is 201100044491. The reversal of 201100044421 is 124440001102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191017073025 + 10082971396 = 437055^2 + 100414^2 .

It is a cyclic number.

It is not a de Polignac number, because 201100044421 - 2¹ = 201100044419 is a prime.

It is a super-2 number, since 2×201100044421² (a number of 23 digits) contains 22 as substring.

Together with 201100044419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201100044491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100550022210 + 100550022211.

It is an arithmetic number, because the mean of its divisors is an integer number (100550022211).

Almost surely, 2^201100044421 is an apocalyptic number.

It is an amenable number.

201100044421 is a deficient number, since it is larger than the sum of its proper divisors (1).

201100044421 is an equidigital number, since it uses as much as digits as its factorization.

201100044421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 201100044421 its reverse (124440001102), we get a palindrome (325540045523).

The spelling of 201100044421 in words is "two hundred one billion, one hundred million, forty-four thousand, four hundred twenty-one".