31340121140 has 36 divisors (see below), whose sum is σ = 69460489476. Its totient is φ = 11876253696.

The previous prime is 31340121139. The next prime is 31340121167. The reversal of 31340121140 is 4112104313.

It can be written as a sum of positive squares in 2 ways, for example, as 23358842896 + 7981278244 = 152836^2 + 89338^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2163149 + ... + 2177588.

It is an arithmetic number, because the mean of its divisors is an integer number (1929458041).

Almost surely, 2^31340121140 is an apocalyptic number.

It is an amenable number.

31340121140 is an abundant number, since it is smaller than the sum of its proper divisors (38120368336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31340121140 is a wasteful number, since it uses less digits than its factorization.

31340121140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4340784 (or 4340763 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31340121140 its reverse (4112104313), we get a palindrome (35452225453).

The spelling of 31340121140 in words is "thirty-one billion, three hundred forty million, one hundred twenty-one thousand, one hundred forty".