201122400442 has 4 divisors (see below), whose sum is σ = 301683600666. Its totient is φ = 100561200220.

The previous prime is 201122400407. The next prime is 201122400467. The reversal of 201122400442 is 244004221102.

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., 172757440881 + 28364959561 = 415641^2 + 168419^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50280600109 + ... + 50280600112.

Almost surely, 2^201122400442 is an apocalyptic number.

201122400442 is a deficient number, since it is larger than the sum of its proper divisors (100561200224).

201122400442 is a wasteful number, since it uses less digits than its factorization.

201122400442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100561200223.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 201122400442 its reverse (244004221102), we get a palindrome (445126621544).

The spelling of 201122400442 in words is "two hundred one billion, one hundred twenty-two million, four hundred thousand, four hundred forty-two".