31121243040124 has 24 divisors (see below), whose sum is σ = 55496233362528. Its totient is φ = 15265244829120.

The previous prime is 31121243040073. The next prime is 31121243040127. The reversal of 31121243040124 is 42104034212113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31121243040092 and 31121243040101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121243040127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6734512 + ... + 10372855.

It is an arithmetic number, because the mean of its divisors is an integer number (2312343056772).

Almost surely, 2^{31121243040124} is an apocalyptic number.

It is an amenable number.

31121243040124 is a deficient number, since it is larger than the sum of its proper divisors (24374990322404).

31121243040124 is a wasteful number, since it uses less digits than its factorization.

31121243040124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17116005 (or 17116003 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 31121243040124 its reverse (42104034212113), we get a palindrome (73225277252237).

The spelling of 31121243040124 in words is "thirty-one trillion, one hundred twenty-one billion, two hundred forty-three million, forty thousand, one hundred twenty-four".