2122021200 has 120 divisors (see below), whose sum is σ = 7320482848. Its totient is φ = 522339840.

The previous prime is 2122021169. The next prime is 2122021217. The reversal of 2122021200 is 21202212.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52414 + ... + 83613.

Almost surely, 2^2122021200 is an apocalyptic number.

2122021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2122021200 is an abundant number, since it is smaller than the sum of its proper divisors (5198461648).

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

2122021200 is a wasteful number, since it uses less digits than its factorization.

2122021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136061 (or 136050 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2122021200 is about 46065.4013333217. The cubic root of 2122021200 is about 1285.0397823634.

Adding to 2122021200 its reverse (21202212), we get a palindrome (2143223412).

The spelling of 2122021200 in words is "two billion, one hundred twenty-two million, twenty-one thousand, two hundred".