20210102212120 has 128 divisors (see below), whose sum is σ = 47365433640000. Its totient is φ = 7751428249600.

The previous prime is 20210102212093. The next prime is 20210102212121. The reversal of 20210102212120 is 2121220101202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20210102212094 and 20210102212103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210102212121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1502491395 + ... + 1502504845.

Almost surely, 2^{20210102212120} is an apocalyptic number.

20210102212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20210102212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23682716820000).

20210102212120 is an abundant number, since it is smaller than the sum of its proper divisors (27155331427880).

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

20210102212120 is a wasteful number, since it uses less digits than its factorization.

20210102212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22333 (or 22329 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20210102212120 its reverse (2121220101202), we get a palindrome (22331322313322).

The spelling of 20210102212120 in words is "twenty trillion, two hundred ten billion, one hundred two million, two hundred twelve thousand, one hundred twenty".