201321101042 has 4 divisors (see below), whose sum is σ = 301981651566. Its totient is φ = 100660550520.

The previous prime is 201321101041. The next prime is 201321101063. The reversal of 201321101042 is 240101123102.

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., 124587114961 + 76733986081 = 352969^2 + 277009^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 201321101042.

It is not an unprimeable number, because it can be changed into a prime (201321101041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50330275259 + ... + 50330275262.

Almost surely, 2^201321101042 is an apocalyptic number.

201321101042 is a deficient number, since it is larger than the sum of its proper divisors (100660550524).

201321101042 is a wasteful number, since it uses less digits than its factorization.

201321101042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100660550523.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 201321101042 its reverse (240101123102), we get a palindrome (441422224144).

The spelling of 201321101042 in words is "two hundred one billion, three hundred twenty-one million, one hundred one thousand, forty-two".