21210112230120 has 144 divisors (see below), whose sum is σ = 75769182068580. Its totient is φ = 5141845378560.

The previous prime is 21210112230107. The next prime is 21210112230143. The reversal of 21210112230120 is 2103221101212.

21210112230120 is a `hidden beast` number, since 21 + 210 + 112 + 2 + 301 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20931119102916 + 278993127204 = 4575054^2 + 528198^2 .

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 = 21210112230093 and 21210112230102.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 243415029 + ... + 243502148.

Almost surely, 2^{21210112230120} is an apocalyptic number.

21210112230120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210112230120 is an abundant number, since it is smaller than the sum of its proper divisors (54559069838460).

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

21210112230120 is a wasteful number, since it uses less digits than its factorization.

21210112230120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486917216 (or 486917198 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21210112230120 its reverse (2103221101212), we get a palindrome (23313333331332).

The spelling of 21210112230120 in words is "twenty-one trillion, two hundred ten billion, one hundred twelve million, two hundred thirty thousand, one hundred twenty".