1130212121 has 8 divisors (see below), whose sum is σ = 1152035784. Its totient is φ = 1108407040.

The previous prime is 1130212117. The next prime is 1130212123. The reversal of 1130212121 is 1212120311.

It can be written as a sum of positive squares in 4 ways, for example, as 30958096 + 1099254025 = 5564^2 + 33155^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1130212121 - 2² = 1130212117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1130212096 and 1130212105.

It is not an unprimeable number, because it can be changed into a prime (1130212123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237041 + ... + 241761.

It is an arithmetic number, because the mean of its divisors is an integer number (144004473).

Almost surely, 2^1130212121 is an apocalyptic number.

It is an amenable number.

1130212121 is a deficient number, since it is larger than the sum of its proper divisors (21823663).

1130212121 is an equidigital number, since it uses as much as digits as its factorization.

1130212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9291.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1130212121 is about 33618.6275894778. The cubic root of 1130212121 is about 1041.6456075899.

Adding to 1130212121 its reverse (1212120311), we get a palindrome (2342332432).

The spelling of 1130212121 in words is "one billion, one hundred thirty million, two hundred twelve thousand, one hundred twenty-one".