2121030120 has 64 divisors (see below), whose sum is σ = 6941557440. Its totient is φ = 514188800.

The previous prime is 2121030089. The next prime is 2121030133. The reversal of 2121030120 is 210301212.

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 = 2121030096 and 2121030105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 802101 + ... + 804740.

It is an arithmetic number, because the mean of its divisors is an integer number (108461835).

Almost surely, 2^2121030120 is an apocalyptic number.

2121030120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121030120 is an abundant number, since it is smaller than the sum of its proper divisors (4820527320).

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

2121030120 is a wasteful number, since it uses less digits than its factorization.

2121030120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606866 (or 1606862 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2121030120 is about 46054.6427627009. The cubic root of 2121030120 is about 1284.8396939521.

Adding to 2121030120 its reverse (210301212), we get a palindrome (2331331332).

The spelling of 2121030120 in words is "two billion, one hundred twenty-one million, thirty thousand, one hundred twenty".