31021322011 has 8 divisors (see below), whose sum is σ = 32116191120. Its totient is φ = 29928130848.

The previous prime is 31021321963. The next prime is 31021322083. The reversal of 31021322011 is 11022312013.

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

It is not a de Polignac number, because 31021322011 - 2¹¹ = 31021319963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41021322011) 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 7 ways as a sum of consecutive naturals, for example, 381801 + ... + 455866.

It is an arithmetic number, because the mean of its divisors is an integer number (4014523890).

Almost surely, 2^31021322011 is an apocalyptic number.

31021322011 is a deficient number, since it is larger than the sum of its proper divisors (1094869109).

31021322011 is a wasteful number, since it uses less digits than its factorization.

31021322011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838973.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31021322011 its reverse (11022312013), we get a palindrome (42043634024).

The spelling of 31021322011 in words is "thirty-one billion, twenty-one million, three hundred twenty-two thousand, eleven".