201243261442 has 8 divisors (see below), whose sum is σ = 310023402876. Its totient is φ = 97902127152.

The previous prime is 201243261409. The next prime is 201243261451. The reversal of 201243261442 is 244162342102.

It can be written as a sum of positive squares in 2 ways, for example, as 172922073921 + 28321187521 = 415839^2 + 168289^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1359751693 + ... + 1359751840.

Almost surely, 2^201243261442 is an apocalyptic number.

201243261442 is a deficient number, since it is larger than the sum of its proper divisors (108780141434).

201243261442 is a wasteful number, since it uses less digits than its factorization.

201243261442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2719503572.

The product of its (nonzero) digits is 18432, while the sum is 31.

The spelling of 201243261442 in words is "two hundred one billion, two hundred forty-three million, two hundred sixty-one thousand, four hundred forty-two".