31431122443111 has 4 divisors (see below), whose sum is σ = 33085392045400. Its totient is φ = 29776852840824.

The previous prime is 31431122443103. The next prime is 31431122443139. The reversal of 31431122443111 is 11134422113413.

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

It is not a de Polignac number, because 31431122443111 - 2³ = 31431122443103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31431122443151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827134801116 + ... + 827134801153.

It is an arithmetic number, because the mean of its divisors is an integer number (8271348011350).

Almost surely, 2^{31431122443111} is an apocalyptic number.

31431122443111 is a deficient number, since it is larger than the sum of its proper divisors (1654269602289).

31431122443111 is a wasteful number, since it uses less digits than its factorization.

31431122443111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654269602288.

The product of its digits is 6912, while the sum is 31.

Adding to 31431122443111 its reverse (11134422113413), we get a palindrome (42565544556524).

The spelling of 31431122443111 in words is "thirty-one trillion, four hundred thirty-one billion, one hundred twenty-two million, four hundred forty-three thousand, one hundred eleven".