20430112121013 has 16 divisors (see below), whose sum is σ = 31173726103040. Its totient is φ = 11658552278256.

The previous prime is 20430112120997. The next prime is 20430112121047. The reversal of 20430112121013 is 31012121103402.

It is not a de Polignac number, because 20430112121013 - 2⁴ = 20430112120997 is a prime.

It is a super-2 number, since 2×20430112121013² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430112129013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 658213495 + ... + 658244532.

It is an arithmetic number, because the mean of its divisors is an integer number (1948357881440).

Almost surely, 2^{20430112121013} is an apocalyptic number.

It is an amenable number.

20430112121013 is a deficient number, since it is larger than the sum of its proper divisors (10743613982027).

20430112121013 is a wasteful number, since it uses less digits than its factorization.

20430112121013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316458776.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 20430112121013 its reverse (31012121103402), we get a palindrome (51442233224415).

The spelling of 20430112121013 in words is "twenty trillion, four hundred thirty billion, one hundred twelve million, one hundred twenty-one thousand, thirteen".