1031020120 has 128 divisors (see below), whose sum is σ = 2569371840. Its totient is φ = 370022400.

The previous prime is 1031020079. The next prime is 1031020127. The reversal of 1031020120 is 210201301.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1031020097 and 1031020106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031020127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3518694 + ... + 3518986.

Almost surely, 2^1031020120 is an apocalyptic number.

1031020120 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 1031020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1284685920).

1031020120 is an abundant number, since it is smaller than the sum of its proper divisors (1538351720).

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

1031020120 is a wasteful number, since it uses less digits than its factorization.

1031020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1031020120 is about 32109.5020204300. The cubic root of 1031020120 is about 1010.2349288490.

Adding to 1031020120 its reverse (210201301), we get a palindrome (1241221421).

The spelling of 1031020120 in words is "one billion, thirty-one million, twenty thousand, one hundred twenty".