31121414280 has 192 divisors, whose sum is σ = 110418422400. Its totient is φ = 7539194880.

The previous prime is 31121414267. The next prime is 31121414281. The reversal of 31121414280 is 8241412113.

It is not an unprimeable number, because it can be changed into a prime (31121414281) 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 47 ways as a sum of consecutive naturals, for example, 10480636 + ... + 10483604.

It is an arithmetic number, because the mean of its divisors is an integer number (575095950).

Almost surely, 2^31121414280 is an apocalyptic number.

31121414280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31121414280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55209211200).

31121414280 is an abundant number, since it is smaller than the sum of its proper divisors (79297008120).

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

31121414280 is a wasteful number, since it uses less digits than its factorization.

31121414280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5644 (or 5637 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

Adding to 31121414280 its reverse (8241412113), we get a palindrome (39362826393).

The spelling of 31121414280 in words is "thirty-one billion, one hundred twenty-one million, four hundred fourteen thousand, two hundred eighty".