31111420120140 has 48 divisors (see below), whose sum is σ = 87563333759328. Its totient is φ = 8253392277504.

The previous prime is 31111420120127. The next prime is 31111420120147. The reversal of 31111420120140 is 4102102411113.

It is not an unprimeable number, because it can be changed into a prime (31111420120147) 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 15 ways as a sum of consecutive naturals, for example, 1343313987 + ... + 1343337146.

It is an arithmetic number, because the mean of its divisors is an integer number (1824236119986).

Almost surely, 2^{31111420120140} is an apocalyptic number.

31111420120140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31111420120140 is an abundant number, since it is smaller than the sum of its proper divisors (56451913639188).

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

31111420120140 is a wasteful number, since it uses less digits than its factorization.

31111420120140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686651338 (or 2686651336 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 31111420120140 its reverse (4102102411113), we get a palindrome (35213522531253).

The spelling of 31111420120140 in words is "thirty-one trillion, one hundred eleven billion, four hundred twenty million, one hundred twenty thousand, one hundred forty".