31112221221011 has 8 divisors (see below), whose sum is σ = 35556896363520. Its totient is φ = 26667564106248.

The previous prime is 31112221221001. The next prime is 31112221221019. The reversal of 31112221221011 is 11012212221113.

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 31112221221011 - 2¹⁰ = 31112221219987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31112221221019) 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, 580781 + ... + 7909598.

It is an arithmetic number, because the mean of its divisors is an integer number (4444612045440).

Almost surely, 2^{31112221221011} is an apocalyptic number.

31112221221011 is a deficient number, since it is larger than the sum of its proper divisors (4444675142509).

31112221221011 is an equidigital number, since it uses as much as digits as its factorization.

31112221221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9013873.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 31112221221011 its reverse (11012212221113), we get a palindrome (42124433442124).

The spelling of 31112221221011 in words is "thirty-one trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, eleven".