20120112012420 has 144 divisors (see below), whose sum is σ = 69870607567488. Its totient is φ = 4590912245760.

The previous prime is 20120112012391. The next prime is 20120112012431. The reversal of 20120112012420 is 2421021102102.

20120112012420 is a `hidden beast` number, since 2 + 0 + 120 + 1 + 120 + 1 + 2 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20120112012393 and 20120112012402.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13110366 + ... + 14564405.

It is an arithmetic number, because the mean of its divisors is an integer number (485212552552).

Almost surely, 2^{20120112012420} is an apocalyptic number.

20120112012420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120112012420 is an abundant number, since it is smaller than the sum of its proper divisors (49750495555068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20120112012420 is a wasteful number, since it uses less digits than its factorization.

20120112012420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27675370 (or 27675365 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20120112012420 its reverse (2421021102102), we get a palindrome (22541133114522).

The spelling of 20120112012420 in words is "twenty trillion, one hundred twenty billion, one hundred twelve million, twelve thousand, four hundred twenty".