31121300102311 has 4 divisors (see below), whose sum is σ = 31307655192912. Its totient is φ = 30934945011712.

The previous prime is 31121300102273. The next prime is 31121300102357. The reversal of 31121300102311 is 11320100312113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31121300102311 - 2⁷ = 31121300102183 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 (31121300106311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93177545050 + ... + 93177545383.

It is an arithmetic number, because the mean of its divisors is an integer number (7826913798228).

Almost surely, 2^{31121300102311} is an apocalyptic number.

31121300102311 is a deficient number, since it is larger than the sum of its proper divisors (186355090601).

31121300102311 is a wasteful number, since it uses less digits than its factorization.

31121300102311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186355090600.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 31121300102311 its reverse (11320100312113), we get a palindrome (42441400414424).

The spelling of 31121300102311 in words is "thirty-one trillion, one hundred twenty-one billion, three hundred million, one hundred two thousand, three hundred eleven".