31303121103 has 6 divisors (see below), whose sum is σ = 45215619384. Its totient is φ = 20868747396.

The previous prime is 31303121033. The next prime is 31303121107. The reversal of 31303121103 is 30112130313.

It is a happy number.

It is not a de Polignac number, because 31303121103 - 2⁹ = 31303120591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31303121107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1739062275 + ... + 1739062292.

It is an arithmetic number, because the mean of its divisors is an integer number (7535936564).

Almost surely, 2^31303121103 is an apocalyptic number.

31303121103 is a deficient number, since it is larger than the sum of its proper divisors (13912498281).

31303121103 is a wasteful number, since it uses less digits than its factorization.

31303121103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478124573 (or 3478124570 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31303121103 its reverse (30112130313), we get a palindrome (61415251416).

The spelling of 31303121103 in words is "thirty-one billion, three hundred three million, one hundred twenty-one thousand, one hundred three".