1031242321220 has 48 divisors (see below), whose sum is σ = 2195852461488. Its totient is φ = 406739220480.

The previous prime is 1031242321129. The next prime is 1031242321223. The reversal of 1031242321220 is 221232421301.

It can be written as a sum of positive squares in 8 ways, for example, as 12301471744 + 1018940849476 = 110912^2 + 1009426^2 .

It is not an unprimeable number, because it can be changed into a prime (1031242321223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5575262 + ... + 5757258.

It is an arithmetic number, because the mean of its divisors is an integer number (45746926281).

Almost surely, 2^{1031242321220} is an apocalyptic number.

1031242321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031242321220 is an abundant number, since it is smaller than the sum of its proper divisors (1164610140268).

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

1031242321220 is a wasteful number, since it uses less digits than its factorization.

1031242321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185960 (or 185958 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1031242321220 its reverse (221232421301), we get a palindrome (1252474742521).

The spelling of 1031242321220 in words is "one trillion, thirty-one billion, two hundred forty-two million, three hundred twenty-one thousand, two hundred twenty".