1101023121 has 16 divisors (see below), whose sum is σ = 1605869568. Its totient is φ = 665461200.

The previous prime is 1101023111. The next prime is 1101023123. The reversal of 1101023121 is 1213201011.

It is not a de Polignac number, because 1101023121 - 2⁵ = 1101023089 is a prime.

1101023121 is a modest number, since divided by 23121 gives 1101 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1101023097 and 1101023106.

It is not an unprimeable number, because it can be changed into a prime (1101023123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33345 + ... + 57566.

It is an arithmetic number, because the mean of its divisors is an integer number (100366848).

Almost surely, 2^1101023121 is an apocalyptic number.

1101023121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1101023121 is a deficient number, since it is larger than the sum of its proper divisors (504846447).

1101023121 is a wasteful number, since it uses less digits than its factorization.

1101023121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91292.

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

The square root of 1101023121 is about 33181.6684481055. The cubic root of 1101023121 is about 1032.6000609681.

Adding to 1101023121 its reverse (1213201011), we get a palindrome (2314224132).

The spelling of 1101023121 in words is "one billion, one hundred one million, twenty-three thousand, one hundred twenty-one".