31111240120 has 16 divisors (see below), whose sum is σ = 70000290360. Its totient is φ = 12444496032.

The previous prime is 31111240079. The next prime is 31111240123. The reversal of 31111240120 is 2104211113.

It is a super-2 number, since 2×31111240120² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31111240094 and 31111240103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31111240123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388890462 + ... + 388890541.

Almost surely, 2^31111240120 is an apocalyptic number.

It is an amenable number.

31111240120 is an abundant number, since it is smaller than the sum of its proper divisors (38889050240).

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

31111240120 is a wasteful number, since it uses less digits than its factorization.

31111240120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777781014 (or 777781010 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31111240120 its reverse (2104211113), we get a palindrome (33215451233).

The spelling of 31111240120 in words is "thirty-one billion, one hundred eleven million, two hundred forty thousand, one hundred twenty".