201143100442 has 4 divisors (see below), whose sum is σ = 301714650666. Its totient is φ = 100571550220.

The previous prime is 201143100437. The next prime is 201143100511. The reversal of 201143100442 is 244001341102.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 183243068761 + 17900031681 = 428069^2 + 133791^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50285775109 + ... + 50285775112.

Almost surely, 2^201143100442 is an apocalyptic number.

201143100442 is a deficient number, since it is larger than the sum of its proper divisors (100571550224).

201143100442 is a wasteful number, since it uses less digits than its factorization.

201143100442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100571550223.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 201143100442 its reverse (244001341102), we get a palindrome (445144441544).

The spelling of 201143100442 in words is "two hundred one billion, one hundred forty-three million, one hundred thousand, four hundred forty-two".