2121420004 has 48 divisors (see below), whose sum is σ = 4347072576. Its totient is φ = 895104000.

The previous prime is 2121419999. The next prime is 2121420011. The reversal of 2121420004 is 4000241212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121420004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35179 + ... + 74029.

It is an arithmetic number, because the mean of its divisors is an integer number (90564012).

Almost surely, 2^2121420004 is an apocalyptic number.

It is an amenable number.

2121420004 is an abundant number, since it is smaller than the sum of its proper divisors (2225652572).

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

2121420004 is a wasteful number, since it uses less digits than its factorization.

2121420004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38956 (or 38954 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2121420004 is about 46058.8754096320. The cubic root of 2121420004 is about 1284.9184147812.

Adding to 2121420004 its reverse (4000241212), we get a palindrome (6121661216).

The spelling of 2121420004 in words is "two billion, one hundred twenty-one million, four hundred twenty thousand, four".