31330001203220 has 24 divisors (see below), whose sum is σ = 66311057670144. Its totient is φ = 12433323311136.

The previous prime is 31330001203217. The next prime is 31330001203229. The reversal of 31330001203220 is 2230210003313.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31330001203192 and 31330001203201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31330001203229) 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 7 ways as a sum of consecutive naturals, for example, 6167320532 + ... + 6167325611.

It is an arithmetic number, because the mean of its divisors is an integer number (2762960736256).

Almost surely, 2^{31330001203220} is an apocalyptic number.

It is an amenable number.

31330001203220 is an abundant number, since it is smaller than the sum of its proper divisors (34981056466924).

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

31330001203220 is a wasteful number, since it uses less digits than its factorization.

31330001203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12334646279 (or 12334646277 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31330001203220 its reverse (2230210003313), we get a palindrome (33560211206533).

The spelling of 31330001203220 in words is "thirty-one trillion, three hundred thirty billion, one million, two hundred three thousand, two hundred twenty".