31321123022220 has 24 divisors (see below), whose sum is σ = 87699144462384. Its totient is φ = 8352299472576.

The previous prime is 31321123022209. The next prime is 31321123022227. The reversal of 31321123022220 is 2222032112313.

It is a super-2 number, since 2×31321123022220² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31321123022227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261009358459 + ... + 261009358578.

It is an arithmetic number, because the mean of its divisors is an integer number (3654131019266).

Almost surely, 2^{31321123022220} is an apocalyptic number.

31321123022220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31321123022220 is an abundant number, since it is smaller than the sum of its proper divisors (56378021440164).

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

31321123022220 is a wasteful number, since it uses less digits than its factorization.

31321123022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522018717049 (or 522018717047 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31321123022220 its reverse (2222032112313), we get a palindrome (33543155134533).

The spelling of 31321123022220 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred twenty-three million, twenty-two thousand, two hundred twenty".