2121210120 has 32 divisors (see below), whose sum is σ = 6363630720. Its totient is φ = 565656000.

The previous prime is 2121210107. The next prime is 2121210127. The reversal of 2121210120 is 210121212.

2121210120 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×2121210120³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2121210096 and 2121210105.

It is not an unprimeable number, because it can be changed into a prime (2121210127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8838256 + ... + 8838495.

It is an arithmetic number, because the mean of its divisors is an integer number (198863460).

Almost surely, 2^2121210120 is an apocalyptic number.

2121210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121210120 is an abundant number, since it is smaller than the sum of its proper divisors (4242420600).

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

2121210120 is a wasteful number, since it uses less digits than its factorization.

2121210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17676765 (or 17676761 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2121210120 is about 46056.5969216137. The cubic root of 2121210120 is about 1284.8760386510.

Adding to 2121210120 its reverse (210121212), we get a palindrome (2331331332).

The spelling of 2121210120 in words is "two billion, one hundred twenty-one million, two hundred ten thousand, one hundred twenty".