31110343021 has 8 divisors (see below), whose sum is σ = 32362912800. Its totient is φ = 29869759920.

The previous prime is 31110343013. The next prime is 31110343027. The reversal of 31110343021 is 12034301113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31110343021 - 2³ = 31110343013 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 31110343021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31110343027) 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 7 ways as a sum of consecutive naturals, for example, 2991375 + ... + 3001756.

It is an arithmetic number, because the mean of its divisors is an integer number (4045364100).

Almost surely, 2^31110343021 is an apocalyptic number.

It is an amenable number.

31110343021 is a deficient number, since it is larger than the sum of its proper divisors (1252569779).

31110343021 is a wasteful number, since it uses less digits than its factorization.

31110343021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5993339.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31110343021 its reverse (12034301113), we get a palindrome (43144644134).

The spelling of 31110343021 in words is "thirty-one billion, one hundred ten million, three hundred forty-three thousand, twenty-one".