31301131222103 has 4 divisors (see below), whose sum is σ = 31814264520888. Its totient is φ = 30787997923320.

The previous prime is 31301131222079. The next prime is 31301131222169. The reversal of 31301131222103 is 30122213110313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31301131222103 is a prime.

It is a super-2 number, since 2×31301131222103² (a number of 28 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 (31301131222303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256566649301 + ... + 256566649422.

It is an arithmetic number, because the mean of its divisors is an integer number (7953566130222).

Almost surely, 2^{31301131222103} is an apocalyptic number.

31301131222103 is a deficient number, since it is larger than the sum of its proper divisors (513133298785).

31301131222103 is an equidigital number, since it uses as much as digits as its factorization.

31301131222103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513133298784.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31301131222103 its reverse (30122213110313), we get a palindrome (61423344332416).

The spelling of 31301131222103 in words is "thirty-one trillion, three hundred one billion, one hundred thirty-one million, two hundred twenty-two thousand, one hundred three".