31321103011311 has 16 divisors (see below), whose sum is σ = 42891206037984. Its totient is φ = 20315895214464.

The previous prime is 31321103011279. The next prime is 31321103011343. The reversal of 31321103011311 is 11311030112313.

It is an interprime number because it is at equal distance from previous prime (31321103011279) and next prime (31321103011343).

It is not a de Polignac number, because 31321103011311 - 2⁵ = 31321103011279 is a prime.

It is a super-2 number, since 2×31321103011311² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321103011411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1151305 + ... + 7997981.

It is an arithmetic number, because the mean of its divisors is an integer number (2680700377374).

Almost surely, 2^{31321103011311} is an apocalyptic number.

31321103011311 is a deficient number, since it is larger than the sum of its proper divisors (11570103026673).

31321103011311 is a wasteful number, since it uses less digits than its factorization.

31321103011311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6887930.

The product of its (nonzero) digits is 162, while the sum is 21.

Adding to 31321103011311 its reverse (11311030112313), we get a palindrome (42632133123624).

The spelling of 31321103011311 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred three million, eleven thousand, three hundred eleven".