1011320121 has 16 divisors (see below), whose sum is σ = 1567180800. Its totient is φ = 568101648.

The previous prime is 1011320117. The next prime is 1011320179. The reversal of 1011320121 is 1210231101.

1011320121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1011320121 - 2² = 1011320117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011320097 and 1011320106.

It is not an unprimeable number, because it can be changed into a prime (1011320111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406881 + ... + 409358.

It is an arithmetic number, because the mean of its divisors is an integer number (97948800).

Almost surely, 2^1011320121 is an apocalyptic number.

It is an amenable number.

1011320121 is a deficient number, since it is larger than the sum of its proper divisors (555860679).

1011320121 is an equidigital number, since it uses as much as digits as its factorization.

1011320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816308.

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

The square root of 1011320121 is about 31801.2597391990. The cubic root of 1011320121 is about 1003.7592241920.

Adding to 1011320121 its reverse (1210231101), we get a palindrome (2221551222).

The spelling of 1011320121 in words is "one billion, eleven million, three hundred twenty thousand, one hundred twenty-one".