20123130130121 has 4 divisors (see below), whose sum is σ = 20123139297744. Its totient is φ = 20123120962500.

The previous prime is 20123130130049. The next prime is 20123130130127. The reversal of 20123130130121 is 12103103132102.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20123130130121 - 2¹⁸ = 20123129867977 is a prime.

It is a super-2 number, since 2×20123130130121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20123130130093 and 20123130130102.

It is not an unprimeable number, because it can be changed into a prime (20123130130127) 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, 878246 + ... + 6404496.

It is an arithmetic number, because the mean of its divisors is an integer number (5030784824436).

Almost surely, 2^{20123130130121} is an apocalyptic number.

It is an amenable number.

20123130130121 is a deficient number, since it is larger than the sum of its proper divisors (9167623).

20123130130121 is an equidigital number, since it uses as much as digits as its factorization.

20123130130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9167622.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20123130130121 its reverse (12103103132102), we get a palindrome (32226233262223).

The spelling of 20123130130121 in words is "twenty trillion, one hundred twenty-three billion, one hundred thirty million, one hundred thirty thousand, one hundred twenty-one".