130123101221 has 2 divisors, whose sum is σ = 130123101222. Its totient is φ = 130123101220.

The previous prime is 130123101203. The next prime is 130123101247. The reversal of 130123101221 is 122101321031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73782856900 + 56340244321 = 271630^2 + 237361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130123101221 is a prime.

It is a super-2 number, since 2×130123101221² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain 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 130123101221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130123106221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65061550610 + 65061550611.

It is an arithmetic number, because the mean of its divisors is an integer number (65061550611).

Almost surely, 2^130123101221 is an apocalyptic number.

It is an amenable number.

130123101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

130123101221 is an equidigital number, since it uses as much as digits as its factorization.

130123101221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 130123101221 its reverse (122101321031), we get a palindrome (252224422252).

The spelling of 130123101221 in words is "one hundred thirty billion, one hundred twenty-three million, one hundred one thousand, two hundred twenty-one".