1020003123120 has 40 divisors (see below), whose sum is σ = 3162009682416. Its totient is φ = 272000832768.

The previous prime is 1020003123107. The next prime is 1020003123199. The reversal of 1020003123120 is 213213000201.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×1020003123120³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1020003123120.

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, 2125006267 + ... + 2125006746.

Almost surely, 2^{1020003123120} is an apocalyptic number.

1020003123120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020003123120 is an abundant number, since it is smaller than the sum of its proper divisors (2142006559296).

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

1020003123120 is a wasteful number, since it uses less digits than its factorization.

1020003123120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250013029 (or 4250013023 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1020003123120 its reverse (213213000201), we get a palindrome (1233216123321).

The spelling of 1020003123120 in words is "one trillion, twenty billion, three million, one hundred twenty-three thousand, one hundred twenty".