103311312031 has 4 divisors (see below), whose sum is σ = 103576894200. Its totient is φ = 103045729864.

The previous prime is 103311312029. The next prime is 103311312043. The reversal of 103311312031 is 130213113301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130213113301 = 67 ⋅1943479303.

It is a cyclic number.

It is not a de Polignac number, because 103311312031 - 2¹ = 103311312029 is a prime.

It is a super-2 number, since 2×103311312031² (a number of 23 digits) contains 22 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 (103311312631) 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, 132790501 + ... + 132791278.

It is an arithmetic number, because the mean of its divisors is an integer number (25894223550).

Almost surely, 2^103311312031 is an apocalyptic number.

103311312031 is a deficient number, since it is larger than the sum of its proper divisors (265582169).

103311312031 is an equidigital number, since it uses as much as digits as its factorization.

103311312031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265582168.

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

Adding to 103311312031 its reverse (130213113301), we get a palindrome (233524425332).

The spelling of 103311312031 in words is "one hundred three billion, three hundred eleven million, three hundred twelve thousand, thirty-one".