31031212133311 has 8 divisors (see below), whose sum is σ = 33501565684944. Its totient is φ = 28572763900800.

The previous prime is 31031212133249. The next prime is 31031212133417. The reversal of 31031212133311 is 11333121213013.

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

It is a cyclic number.

It is not a de Polignac number, because 31031212133311 - 2¹¹ = 31031212131263 is a prime.

It is a super-2 number, since 2×31031212133311² (a number of 28 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 (31031212134311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2976324361 + ... + 2976334786.

It is an arithmetic number, because the mean of its divisors is an integer number (4187695710618).

Almost surely, 2^{31031212133311} is an apocalyptic number.

31031212133311 is a deficient number, since it is larger than the sum of its proper divisors (2470353551633).

31031212133311 is a wasteful number, since it uses less digits than its factorization.

31031212133311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5952659561.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31031212133311 its reverse (11333121213013), we get a palindrome (42364333346324).

The spelling of 31031212133311 in words is "thirty-one trillion, thirty-one billion, two hundred twelve million, one hundred thirty-three thousand, three hundred eleven".