2121202120 has 32 divisors (see below), whose sum is σ = 4874256000. Its totient is φ = 830427328.

The previous prime is 2121202051. The next prime is 2121202141. The reversal of 2121202120 is 212021212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121202120.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562270 + ... + 566029.

It is an arithmetic number, because the mean of its divisors is an integer number (152320500).

Almost surely, 2^2121202120 is an apocalyptic number.

2121202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121202120 is an abundant number, since it is smaller than the sum of its proper divisors (2753053880).

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

2121202120 is a wasteful number, since it uses less digits than its factorization.

2121202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128357 (or 1128353 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2121202120 is about 46056.5100718671. The cubic root of 2121202120 is about 1284.8744233747.

Adding to 2121202120 its reverse (212021212), we get a palindrome (2333223332).

The spelling of 2121202120 in words is "two billion, one hundred twenty-one million, two hundred two thousand, one hundred twenty".