212121033110120 has 32 divisors (see below), whose sum is σ = 477274406112000. Its totient is φ = 84848043179328.

The previous prime is 212121033110081. The next prime is 212121033110137. The reversal of 212121033110120 is 21011330121212.

It is a super-3 number, since 3×212121033110120³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 212121033110092 and 212121033110101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2184764 + ... + 20712683.

It is an arithmetic number, because the mean of its divisors is an integer number (14914825191000).

Almost surely, 2^{212121033110120} is an apocalyptic number.

212121033110120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121033110120 is an abundant number, since it is smaller than the sum of its proper divisors (265153373001880).

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

212121033110120 is a wasteful number, since it uses less digits than its factorization.

212121033110120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23129057 (or 23129053 counting only the distinct ones).

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

Adding to 212121033110120 its reverse (21011330121212), we get a palindrome (233132363231332).

The spelling of 212121033110120 in words is "two hundred twelve trillion, one hundred twenty-one billion, thirty-three million, one hundred ten thousand, one hundred twenty".