31003121311 has 8 divisors (see below), whose sum is σ = 31193447040. Its totient is φ = 30812851608.

The previous prime is 31003121287. The next prime is 31003121333. The reversal of 31003121311 is 11312130013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31003121311 is a prime.

It is a super-2 number, since 2×31003121311² (a number of 22 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 (31003121371) 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 7 ways as a sum of consecutive naturals, for example, 1838460 + ... + 1855246.

It is an arithmetic number, because the mean of its divisors is an integer number (3899180880).

Almost surely, 2^31003121311 is an apocalyptic number.

31003121311 is a deficient number, since it is larger than the sum of its proper divisors (190325729).

31003121311 is a wasteful number, since it uses less digits than its factorization.

31003121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28013.

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

Adding to 31003121311 its reverse (11312130013), we get a palindrome (42315251324).

The spelling of 31003121311 in words is "thirty-one billion, three million, one hundred twenty-one thousand, three hundred eleven".