130123120021 has 4 divisors (see below), whose sum is σ = 130134498912. Its totient is φ = 130111741132.

The previous prime is 130123120013. The next prime is 130123120037. The reversal of 130123120021 is 120021321031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120021321031 = 53 ⋅2264553227.

It is a cyclic number.

It is not a de Polignac number, because 130123120021 - 2³ = 130123120013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130123119977 and 130123120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130123120051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5672275 + ... + 5695168.

It is an arithmetic number, because the mean of its divisors is an integer number (32533624728).

Almost surely, 2^130123120021 is an apocalyptic number.

It is an amenable number.

130123120021 is a deficient number, since it is larger than the sum of its proper divisors (11378891).

130123120021 is a wasteful number, since it uses less digits than its factorization.

130123120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11378890.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 130123120021 its reverse (120021321031), we get a palindrome (250144441052).

The spelling of 130123120021 in words is "one hundred thirty billion, one hundred twenty-three million, one hundred twenty thousand, twenty-one".