31444212111 has 32 divisors (see below), whose sum is σ = 47130273792. Its totient is φ = 18502471680.

The previous prime is 31444212109. The next prime is 31444212131. The reversal of 31444212111 is 11121244413.

It is a happy number.

It is not a de Polignac number, because 31444212111 - 2¹ = 31444212109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31444212131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4015546 + ... + 4023368.

It is an arithmetic number, because the mean of its divisors is an integer number (1472821056).

Almost surely, 2^31444212111 is an apocalyptic number.

31444212111 is a deficient number, since it is larger than the sum of its proper divisors (15686061681).

31444212111 is a wasteful number, since it uses less digits than its factorization.

31444212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12343.

The product of its digits is 768, while the sum is 24.

Adding to 31444212111 its reverse (11121244413), we get a palindrome (42565456524).

The spelling of 31444212111 in words is "thirty-one billion, four hundred forty-four million, two hundred twelve thousand, one hundred eleven".