31123210332211 has 8 divisors (see below), whose sum is σ = 31651035609600. Its totient is φ = 30595395496200.

The previous prime is 31123210332169. The next prime is 31123210332251. The reversal of 31123210332211 is 11223301232113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31123210332211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31123210332251) 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, 3522886 + ... + 8640436.

It is an arithmetic number, because the mean of its divisors is an integer number (3956379451200).

Almost surely, 2^{31123210332211} is an apocalyptic number.

31123210332211 is a deficient number, since it is larger than the sum of its proper divisors (527825277389).

31123210332211 is a wasteful number, since it uses less digits than its factorization.

31123210332211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5220689.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 31123210332211 its reverse (11223301232113), we get a palindrome (42346511564324).

The spelling of 31123210332211 in words is "thirty-one trillion, one hundred twenty-three billion, two hundred ten million, three hundred thirty-two thousand, two hundred eleven".