31020323213011 has 16 divisors (see below), whose sum is σ = 35910763365600. Its totient is φ = 26482340577280.

The previous prime is 31020323213003. The next prime is 31020323213051. The reversal of 31020323213011 is 11031232302013.

It is not a de Polignac number, because 31020323213011 - 2³ = 31020323213003 is a prime.

It is a super-2 number, since 2×31020323213011² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31020323213051) 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, 184642186 + ... + 184810111.

It is an arithmetic number, because the mean of its divisors is an integer number (2244422710350).

Almost surely, 2^{31020323213011} is an apocalyptic number.

31020323213011 is a deficient number, since it is larger than the sum of its proper divisors (4890440152589).

31020323213011 is a wasteful number, since it uses less digits than its factorization.

31020323213011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369452774.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31020323213011 its reverse (11031232302013), we get a palindrome (42051555515024).

The spelling of 31020323213011 in words is "thirty-one trillion, twenty billion, three hundred twenty-three million, two hundred thirteen thousand, eleven".