1020110121 has 24 divisors (see below), whose sum is σ = 1483924104. Its totient is φ = 675279360.

The previous prime is 1020110111. The next prime is 1020110123. The reversal of 1020110121 is 1210110201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6579225 + 1013530896 = 2565^2 + 31836^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1020110121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1020110123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 960931 + ... + 961991.

It is an arithmetic number, because the mean of its divisors is an integer number (61830171).

Almost surely, 2^1020110121 is an apocalyptic number.

It is an amenable number.

1020110121 is a deficient number, since it is larger than the sum of its proper divisors (463813983).

1020110121 is a wasteful number, since it uses less digits than its factorization.

1020110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721 (or 1718 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1020110121 is about 31939.1628099423. The cubic root of 1020110121 is about 1006.6589338446.

Adding to 1020110121 its reverse (1210110201), we get a palindrome (2230220322).

The spelling of 1020110121 in words is "one billion, twenty million, one hundred ten thousand, one hundred twenty-one".