31203103201 has 4 divisors (see below), whose sum is σ = 31213876932. Its totient is φ = 31192329472.

The previous prime is 31203103187. The next prime is 31203103207. The reversal of 31203103201 is 10230130213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10230130213 = 11783 ⋅868211.

It can be written as a sum of positive squares in 2 ways, for example, as 7317091600 + 23886011601 = 85540^2 + 154551^2 .

It is a cyclic number.

It is not a de Polignac number, because 31203103201 - 2²⁷ = 31068885473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31203103207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5382520 + ... + 5388313.

It is an arithmetic number, because the mean of its divisors is an integer number (7803469233).

Almost surely, 2^31203103201 is an apocalyptic number.

It is an amenable number.

31203103201 is a deficient number, since it is larger than the sum of its proper divisors (10773731).

31203103201 is a wasteful number, since it uses less digits than its factorization.

31203103201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10773730.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31203103201 its reverse (10230130213), we get a palindrome (41433233414).

The spelling of 31203103201 in words is "thirty-one billion, two hundred three million, one hundred three thousand, two hundred one".