31311310220130 has 128 divisors (see below), whose sum is σ = 77851031040000. Its totient is φ = 8054521265664.

The previous prime is 31311310220129. The next prime is 31311310220159. The reversal of 31311310220130 is 3102201311313.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31311310220097 and 31311310220106.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 150070621 + ... + 150279119.

It is an arithmetic number, because the mean of its divisors is an integer number (608211180000).

Almost surely, 2^{31311310220130} is an apocalyptic number.

31311310220130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31311310220130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38925515520000).

31311310220130 is an abundant number, since it is smaller than the sum of its proper divisors (46539720819870).

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

31311310220130 is a wasteful number, since it uses less digits than its factorization.

31311310220130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210088.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 31311310220130 its reverse (3102201311313), we get a palindrome (34413511531443).

The spelling of 31311310220130 in words is "thirty-one trillion, three hundred eleven billion, three hundred ten million, two hundred twenty thousand, one hundred thirty".