31201113103 has 4 divisors (see below), whose sum is σ = 31203962368. Its totient is φ = 31198263840.

The previous prime is 31201113101. The next prime is 31201113179. The reversal of 31201113103 is 30131110213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30131110213 = 5581 ⋅5398873.

It is a cyclic number.

It is not a de Polignac number, because 31201113103 - 2¹ = 31201113101 is a prime.

It is a super-3 number, since 3×31201113103³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31201113101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1408143 + ... + 1430128.

It is an arithmetic number, because the mean of its divisors is an integer number (7800990592).

Almost surely, 2^31201113103 is an apocalyptic number.

31201113103 is a deficient number, since it is larger than the sum of its proper divisors (2849265).

31201113103 is a wasteful number, since it uses less digits than its factorization.

31201113103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2849264.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31201113103 its reverse (30131110213), we get a palindrome (61332223316).

The spelling of 31201113103 in words is "thirty-one billion, two hundred one million, one hundred thirteen thousand, one hundred three".