1020203120 has 20 divisors (see below), whose sum is σ = 2371972440. Its totient is φ = 408081216.

The previous prime is 1020203089. The next prime is 1020203131. The reversal of 1020203120 is 213020201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6376190 + ... + 6376349.

It is an arithmetic number, because the mean of its divisors is an integer number (118598622).

Almost surely, 2^1020203120 is an apocalyptic number.

1020203120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020203120 is an abundant number, since it is smaller than the sum of its proper divisors (1351769320).

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

1020203120 is a wasteful number, since it uses less digits than its factorization.

1020203120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12752552 (or 12752546 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1020203120 is about 31940.6186539960. The cubic root of 1020203120 is about 1006.6895238196.

Adding to 1020203120 its reverse (213020201), we get a palindrome (1233223321).

The spelling of 1020203120 in words is "one billion, twenty million, two hundred three thousand, one hundred twenty".