130123121221 has 8 divisors (see below), whose sum is σ = 130348998360. Its totient is φ = 129897341952.

The previous prime is 130123121203. The next prime is 130123121231. The reversal of 130123121221 is 122121321031.

It can be written as a sum of positive squares in 4 ways, for example, as 3109289121 + 127013832100 = 55761^2 + 356390^2 .

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 130123121221 - 2¹¹ = 130123119173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130123121201) 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, 2945331 + ... + 2989183.

It is an arithmetic number, because the mean of its divisors is an integer number (16293624795).

Almost surely, 2^130123121221 is an apocalyptic number.

It is an amenable number.

130123121221 is a deficient number, since it is larger than the sum of its proper divisors (225877139).

130123121221 is an equidigital number, since it uses as much as digits as its factorization.

130123121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48935.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 130123121221 its reverse (122121321031), we get a palindrome (252244442252).

The spelling of 130123121221 in words is "one hundred thirty billion, one hundred twenty-three million, one hundred twenty-one thousand, two hundred twenty-one".