31201103331001 has 4 divisors (see below), whose sum is σ = 31201347223332. Its totient is φ = 31200859438672.

The previous prime is 31201103330983. The next prime is 31201103331023. The reversal of 31201103331001 is 10013330110213.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22730238605376 + 8470864725625 = 4767624^2 + 2910475^2 .

It is a cyclic number.

It is not a de Polignac number, because 31201103331001 - 2²⁷ = 31200969113273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31201103331001.

It is not an unprimeable number, because it can be changed into a prime (31201103331301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121754170 + ... + 122010163.

It is an arithmetic number, because the mean of its divisors is an integer number (7800336805833).

Almost surely, 2^{31201103331001} is an apocalyptic number.

It is an amenable number.

31201103331001 is a deficient number, since it is larger than the sum of its proper divisors (243892331).

31201103331001 is a wasteful number, since it uses less digits than its factorization.

31201103331001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243892330.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31201103331001 its reverse (10013330110213), we get a palindrome (41214433441214).

The spelling of 31201103331001 in words is "thirty-one trillion, two hundred one billion, one hundred three million, three hundred thirty-one thousand, one".