1030120203121 has 4 divisors (see below), whose sum is σ = 1031032622500. Its totient is φ = 1029207783744.

The previous prime is 1030120203089. The next prime is 1030120203283. The reversal of 1030120203121 is 1213020210301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 231668942400 + 798451260721 = 481320^2 + 893561^2 .

It is a cyclic number.

It is not a de Polignac number, because 1030120203121 - 2⁵ = 1030120203089 is a prime.

It is a super-2 number, since 2×1030120203121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1030120203095 and 1030120203104.

It is not an unprimeable number, because it can be changed into a prime (1030120203821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456207996 + ... + 456210253.

It is an arithmetic number, because the mean of its divisors is an integer number (257758155625).

Almost surely, 2^{1030120203121} is an apocalyptic number.

It is an amenable number.

1030120203121 is a deficient number, since it is larger than the sum of its proper divisors (912419379).

1030120203121 is an equidigital number, since it uses as much as digits as its factorization.

1030120203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912419378.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1030120203121 its reverse (1213020210301), we get a palindrome (2243140413422).

The spelling of 1030120203121 in words is "one trillion, thirty billion, one hundred twenty million, two hundred three thousand, one hundred twenty-one".