31043421111 has 32 divisors (see below), whose sum is σ = 45168814080. Its totient is φ = 18892224000.

The previous prime is 31043421107. The next prime is 31043421119. The reversal of 31043421111 is 11112434013.

It is not a de Polignac number, because 31043421111 - 2² = 31043421107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31043421119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 374011 + ... + 449411.

It is an arithmetic number, because the mean of its divisors is an integer number (1411525440).

Almost surely, 2^31043421111 is an apocalyptic number.

31043421111 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31043421111 is a deficient number, since it is larger than the sum of its proper divisors (14125392969).

31043421111 is a wasteful number, since it uses less digits than its factorization.

31043421111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75687.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 31043421111 its reverse (11112434013), we get a palindrome (42155855124).

The spelling of 31043421111 in words is "thirty-one billion, forty-three million, four hundred twenty-one thousand, one hundred eleven".