1121020101 has 8 divisors (see below), whose sum is σ = 1660770560. Its totient is φ = 747346716.

The previous prime is 1121020093. The next prime is 1121020129. The reversal of 1121020101 is 1010201211.

It is a happy number.

It is not a de Polignac number, because 1121020101 - 2³ = 1121020093 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121020141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20759605 + ... + 20759658.

It is an arithmetic number, because the mean of its divisors is an integer number (207596320).

Almost surely, 2^1121020101 is an apocalyptic number.

It is an amenable number.

1121020101 is a deficient number, since it is larger than the sum of its proper divisors (539750459).

1121020101 is an equidigital number, since it uses as much as digits as its factorization.

1121020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41519272 (or 41519266 counting only the distinct ones).

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

The square root of 1121020101 is about 33481.6382663692. The cubic root of 1121020101 is about 1038.8140144834.

Adding to 1121020101 its reverse (1010201211), we get a palindrome (2131221312).

The spelling of 1121020101 in words is "one billion, one hundred twenty-one million, twenty thousand, one hundred one".