1131230121 has 32 divisors (see below), whose sum is σ = 1763328000. Its totient is φ = 644812560.

The previous prime is 1131230117. The next prime is 1131230147. The reversal of 1131230121 is 1210321311.

It is a happy number.

1131230121 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1131230121 - 2² = 1131230117 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131230121.

It is not an unprimeable number, because it can be changed into a prime (1131230621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 504120 + ... + 506358.

It is an arithmetic number, because the mean of its divisors is an integer number (55104000).

Almost surely, 2^1131230121 is an apocalyptic number.

It is an amenable number.

1131230121 is a deficient number, since it is larger than the sum of its proper divisors (632097879).

1131230121 is an equidigital number, since it uses as much as digits as its factorization.

1131230121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754 (or 2740 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1131230121 is about 33633.7645974993. The cubic root of 1131230121 is about 1041.9582559847.

Adding to 1131230121 its reverse (1210321311), we get a palindrome (2341551432).

The spelling of 1131230121 in words is "one billion, one hundred thirty-one million, two hundred thirty thousand, one hundred twenty-one".