20112130121213 has 4 divisors (see below), whose sum is σ = 21659217053628. Its totient is φ = 18565043188800.

The previous prime is 20112130121203. The next prime is 20112130121261. The reversal of 20112130121213 is 31212103121102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1381948366969 + 18730181754244 = 1175563^2 + 4327838^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112130121213 - 2³⁴ = 20094950252029 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 (20112130121203) 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, 773543466188 + ... + 773543466213.

It is an arithmetic number, because the mean of its divisors is an integer number (5414804263407).

Almost surely, 2^{20112130121213} is an apocalyptic number.

It is an amenable number.

20112130121213 is a deficient number, since it is larger than the sum of its proper divisors (1547086932415).

20112130121213 is a wasteful number, since it uses less digits than its factorization.

20112130121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547086932414.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20112130121213 its reverse (31212103121102), we get a palindrome (51324233242315).

The spelling of 20112130121213 in words is "twenty trillion, one hundred twelve billion, one hundred thirty million, one hundred twenty-one thousand, two hundred thirteen".