31012122321011 has 16 divisors (see below), whose sum is σ = 33704818113120. Its totient is φ = 28363316451840.

The previous prime is 31012122321001. The next prime is 31012122321013. The reversal of 31012122321011 is 11012322121013.

It is a cyclic number.

It is not a de Polignac number, because 31012122321011 - 2²² = 31012118126707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31012122321013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71087396 + ... + 71522318.

It is an arithmetic number, because the mean of its divisors is an integer number (2106551132070).

Almost surely, 2^{31012122321011} is an apocalyptic number.

31012122321011 is a deficient number, since it is larger than the sum of its proper divisors (2692695792109).

31012122321011 is a wasteful number, since it uses less digits than its factorization.

31012122321011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485366.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 31012122321011 its reverse (11012322121013), we get a palindrome (42024444442024).

The spelling of 31012122321011 in words is "thirty-one trillion, twelve billion, one hundred twenty-two million, three hundred twenty-one thousand, eleven".