31121030311 has 16 divisors (see below), whose sum is σ = 35867547136. Its totient is φ = 26450382816.

The previous prime is 31121030273. The next prime is 31121030321. The reversal of 31121030311 is 11303012113.

It is a cyclic number.

It is not a de Polignac number, because 31121030311 - 2¹⁵ = 31120997543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121030321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506140 + ... + 564286.

It is an arithmetic number, because the mean of its divisors is an integer number (2241721696).

Almost surely, 2^31121030311 is an apocalyptic number.

31121030311 is a deficient number, since it is larger than the sum of its proper divisors (4746516825).

31121030311 is a wasteful number, since it uses less digits than its factorization.

31121030311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58798.

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

Adding to 31121030311 its reverse (11303012113), we get a palindrome (42424042424).

The spelling of 31121030311 in words is "thirty-one billion, one hundred twenty-one million, thirty thousand, three hundred eleven".