31331121302103 has 128 divisors (see below), whose sum is σ = 50125349836800. Its totient is φ = 17037074995200.

The previous prime is 31331121302081. The next prime is 31331121302113. The reversal of 31331121302103 is 30120312113313.

It is not a de Polignac number, because 31331121302103 - 2⁹ = 31331121301591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31331121302113) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2131506448 + ... + 2131521146.

It is an arithmetic number, because the mean of its divisors is an integer number (391604295600).

Almost surely, 2^{31331121302103} is an apocalyptic number.

31331121302103 is a deficient number, since it is larger than the sum of its proper divisors (18794228534697).

31331121302103 is a wasteful number, since it uses less digits than its factorization.

31331121302103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15177.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31331121302103 its reverse (30120312113313), we get a palindrome (61451433415416).

The spelling of 31331121302103 in words is "thirty-one trillion, three hundred thirty-one billion, one hundred twenty-one million, three hundred two thousand, one hundred three".