2121402200 has 48 divisors (see below), whose sum is σ = 5102352000. Its totient is φ = 819297920.

The previous prime is 2121402191. The next prime is 2121402209. The reversal of 2121402200 is 22041212.

It is an interprime number because it is at equal distance from previous prime (2121402191) and next prime (2121402209).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121402209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177080 + ... + 188679.

It is an arithmetic number, because the mean of its divisors is an integer number (106299000).

Almost surely, 2^2121402200 is an apocalyptic number.

2121402200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121402200 is an abundant number, since it is smaller than the sum of its proper divisors (2980949800).

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

2121402200 is a wasteful number, since it uses less digits than its factorization.

2121402200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365804 (or 365795 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2121402200 is about 46058.6821348592. The cubic root of 2121402200 is about 1284.9148202154.

Adding to 2121402200 its reverse (22041212), we get a palindrome (2143443412).

The spelling of 2121402200 in words is "two billion, one hundred twenty-one million, four hundred two thousand, two hundred".