31320213232111 has 4 divisors (see below), whose sum is σ = 31323822807832. Its totient is φ = 31316603656392.

The previous prime is 31320213232081. The next prime is 31320213232141. The reversal of 31320213232111 is 11123231202313.

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

It is an interprime number because it is at equal distance from previous prime (31320213232081) and next prime (31320213232141).

It is a cyclic number.

It is not a de Polignac number, because 31320213232111 - 2⁹ = 31320213231599 is a prime.

It is a super-3 number, since 3×31320213232111³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320213232141) 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, 1804774845 + ... + 1804792198.

It is an arithmetic number, because the mean of its divisors is an integer number (7830955701958).

Almost surely, 2^{31320213232111} is an apocalyptic number.

31320213232111 is a deficient number, since it is larger than the sum of its proper divisors (3609575721).

31320213232111 is an equidigital number, since it uses as much as digits as its factorization.

31320213232111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3609575720.

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

Adding to 31320213232111 its reverse (11123231202313), we get a palindrome (42443444434424).

The spelling of 31320213232111 in words is "thirty-one trillion, three hundred twenty billion, two hundred thirteen million, two hundred thirty-two thousand, one hundred eleven".