31321042242211 has 4 divisors (see below), whose sum is σ = 31324331931624. Its totient is φ = 31317752552800.

The previous prime is 31321042242181. The next prime is 31321042242271. The reversal of 31321042242211 is 11224224012313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31321042242211 - 2¹³ = 31321042234019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31321042242211.

It is not an unprimeable number, because it can be changed into a prime (31321042242271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1644830425 + ... + 1644849466.

It is an arithmetic number, because the mean of its divisors is an integer number (7831082982906).

Almost surely, 2^{31321042242211} is an apocalyptic number.

31321042242211 is a deficient number, since it is larger than the sum of its proper divisors (3289689413).

31321042242211 is an equidigital number, since it uses as much as digits as its factorization.

31321042242211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289689412.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 31321042242211 its reverse (11224224012313), we get a palindrome (42545266254524).

The spelling of 31321042242211 in words is "thirty-one trillion, three hundred twenty-one billion, forty-two million, two hundred forty-two thousand, two hundred eleven".