2181421030 has 8 divisors (see below), whose sum is σ = 3926557872. Its totient is φ = 872568408.

The previous prime is 2181421019. The next prime is 2181421037. The reversal of 2181421030 is 301241812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2181420992 and 2181421010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181421037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109071042 + ... + 109071061.

It is an arithmetic number, because the mean of its divisors is an integer number (490819734).

Almost surely, 2^2181421030 is an apocalyptic number.

2181421030 is a deficient number, since it is larger than the sum of its proper divisors (1745136842).

2181421030 is a wasteful number, since it uses less digits than its factorization.

2181421030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218142110.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 2181421030 is about 46705.6851999840. The cubic root of 2181421030 is about 1296.9199330675.

Adding to 2181421030 its reverse (301241812), we get a palindrome (2482662842).

The spelling of 2181421030 in words is "two billion, one hundred eighty-one million, four hundred twenty-one thousand, thirty".