130212121 has 16 divisors (see below), whose sum is σ = 146288128. Its totient is φ = 115084800.

The previous prime is 130212119. The next prime is 130212151. The reversal of 130212121 is 121212031.

It is a cyclic number.

It is not a de Polignac number, because 130212121 - 2¹ = 130212119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130212101) 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 15 ways as a sum of consecutive naturals, for example, 37426 + ... + 40756.

It is an arithmetic number, because the mean of its divisors is an integer number (9143008).

Almost surely, 2^130212121 is an apocalyptic number.

It is an amenable number.

130212121 is a deficient number, since it is larger than the sum of its proper divisors (16076007).

130212121 is a wasteful number, since it uses less digits than its factorization.

130212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3472.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 130212121 is about 11411.0525807219. The cubic root of 130212121 is about 506.8550808856.

Adding to 130212121 its reverse (121212031), we get a palindrome (251424152).

The spelling of 130212121 in words is "one hundred thirty million, two hundred twelve thousand, one hundred twenty-one".