1031321123120 has 80 divisors (see below), whose sum is σ = 2421184677120. Its totient is φ = 408513272832.

The previous prime is 1031321123117. The next prime is 1031321123141. The reversal of 1031321123120 is 213211231301.

It is a happy number.

1031321123120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

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 = 1031321123092 and 1031321123101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15864122 + ... + 15928998.

It is an arithmetic number, because the mean of its divisors is an integer number (30264808464).

Almost surely, 2^{1031321123120} is an apocalyptic number.

1031321123120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1031321123120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1210592338560).

1031321123120 is an abundant number, since it is smaller than the sum of its proper divisors (1389863554000).

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

1031321123120 is a wasteful number, since it uses less digits than its factorization.

1031321123120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66822 (or 66816 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1031321123120 its reverse (213211231301), we get a palindrome (1244532354421).

The spelling of 1031321123120 in words is "one trillion, thirty-one billion, three hundred twenty-one million, one hundred twenty-three thousand, one hundred twenty".