2121002212004 has 24 divisors (see below), whose sum is σ = 4008407901120. Its totient is φ = 976197281184.

The previous prime is 2121002211943. The next prime is 2121002212009. The reversal of 2121002212004 is 4002122001212.

It is not an unprimeable number, because it can be changed into a prime (2121002212009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56789834 + ... + 56827169.

It is an arithmetic number, because the mean of its divisors is an integer number (167016995880).

Almost surely, 2^{2121002212004} is an apocalyptic number.

It is an amenable number.

2121002212004 is a deficient number, since it is larger than the sum of its proper divisors (1887405689116).

2121002212004 is a wasteful number, since it uses less digits than its factorization.

2121002212004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113617379 (or 113617377 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2121002212004 its reverse (4002122001212), we get a palindrome (6123124213216).

The spelling of 2121002212004 in words is "two trillion, one hundred twenty-one billion, two million, two hundred twelve thousand, four".