31023003121220 has 24 divisors (see below), whose sum is σ = 71070879878208. Its totient is φ = 11281092044000.

The previous prime is 31023003121217. The next prime is 31023003121291. The reversal of 31023003121220 is 2212130032013.

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 = 31023003121192 and 31023003121201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70506825056 + ... + 70506825495.

It is an arithmetic number, because the mean of its divisors is an integer number (2961286661592).

Almost surely, 2^{31023003121220} is an apocalyptic number.

It is an amenable number.

31023003121220 is an abundant number, since it is smaller than the sum of its proper divisors (40047876756988).

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

31023003121220 is a wasteful number, since it uses less digits than its factorization.

31023003121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141013650571 (or 141013650569 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31023003121220 its reverse (2212130032013), we get a palindrome (33235133153233).

The spelling of 31023003121220 in words is "thirty-one trillion, twenty-three billion, three million, one hundred twenty-one thousand, two hundred twenty".