201442001231 has 4 divisors (see below), whose sum is σ = 201461973864. Its totient is φ = 201422028600.

The previous prime is 201442001221. The next prime is 201442001249. The reversal of 201442001231 is 132100244102.

201442001231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201442001231 is a prime.

It is a super-2 number, since 2×201442001231² (a number of 23 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 (201442001221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9971180 + ... + 9991361.

It is an arithmetic number, because the mean of its divisors is an integer number (50365493466).

Almost surely, 2^201442001231 is an apocalyptic number.

201442001231 is a deficient number, since it is larger than the sum of its proper divisors (19972633).

201442001231 is a wasteful number, since it uses less digits than its factorization.

201442001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19972632.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 201442001231 its reverse (132100244102), we get a palindrome (333542245333).

The spelling of 201442001231 in words is "two hundred one billion, four hundred forty-two million, one thousand, two hundred thirty-one".