1213130121 has 8 divisors (see below), whose sum is σ = 1848579264. Its totient is φ = 693217200.

The previous prime is 1213130071. The next prime is 1213130123. The reversal of 1213130121 is 1210313121.

It is a happy number.

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

It is not a de Polignac number, because 1213130121 - 2⁶ = 1213130057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213130121.

It is not an unprimeable number, because it can be changed into a prime (1213130123) 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, 28884030 + ... + 28884071.

It is an arithmetic number, because the mean of its divisors is an integer number (231072408).

Almost surely, 2^1213130121 is an apocalyptic number.

It is an amenable number.

1213130121 is a deficient number, since it is larger than the sum of its proper divisors (635449143).

1213130121 is an equidigital number, since it uses as much as digits as its factorization.

1213130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57768111.

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

The square root of 1213130121 is about 34830.0175279887. The cubic root of 1213130121 is about 1066.5203061662.

Adding to 1213130121 its reverse (1210313121), we get a palindrome (2423443242).

The spelling of 1213130121 in words is "one billion, two hundred thirteen million, one hundred thirty thousand, one hundred twenty-one".