201444121331 has 4 divisors (see below), whose sum is σ = 201447920064. Its totient is φ = 201440322600.

The previous prime is 201444121327. The next prime is 201444121339. The reversal of 201444121331 is 133121444102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201444121331 - 2² = 201444121327 is a prime.

It is a super-2 number, since 2×201444121331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201444121331.

It is not an unprimeable number, because it can be changed into a prime (201444121339) 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, 1818680 + ... + 1926261.

It is an arithmetic number, because the mean of its divisors is an integer number (50361980016).

Almost surely, 2^201444121331 is an apocalyptic number.

201444121331 is a deficient number, since it is larger than the sum of its proper divisors (3798733).

201444121331 is an equidigital number, since it uses as much as digits as its factorization.

201444121331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3798732.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 201444121331 its reverse (133121444102), we get a palindrome (334565565433).

The spelling of 201444121331 in words is "two hundred one billion, four hundred forty-four million, one hundred twenty-one thousand, three hundred thirty-one".