31331001221130 has 192 divisors, whose sum is σ = 85718600403840. Its totient is φ = 7305518158848.

The previous prime is 31331001221129. The next prime is 31331001221153. The reversal of 31331001221130 is 3112210013313.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31331001221097 and 31331001221106.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1480870512 + ... + 1480891668.

It is an arithmetic number, because the mean of its divisors is an integer number (446451043770).

Almost surely, 2^{31331001221130} is an apocalyptic number.

31331001221130 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 31331001221130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42859300201920).

31331001221130 is an abundant number, since it is smaller than the sum of its proper divisors (54387599182710).

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

31331001221130 is a wasteful number, since it uses less digits than its factorization.

31331001221130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36585 (or 36572 counting only the distinct ones).

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

Adding to 31331001221130 its reverse (3112210013313), we get a palindrome (34443211234443).

The spelling of 31331001221130 in words is "thirty-one trillion, three hundred thirty-one billion, one million, two hundred twenty-one thousand, one hundred thirty".