2121404004402 has 16 divisors (see below), whose sum is σ = 4255626163872. Its totient is φ = 704998308960.

The previous prime is 2121404004389. The next prime is 2121404004457. The reversal of 2121404004402 is 2044004041212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534087643 + ... + 534091614.

It is an arithmetic number, because the mean of its divisors is an integer number (265976635242).

Almost surely, 2^{2121404004402} is an apocalyptic number.

2121404004402 is an abundant number, since it is smaller than the sum of its proper divisors (2134222159470).

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

2121404004402 is a wasteful number, since it uses less digits than its factorization.

2121404004402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068179593.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 2121404004402 its reverse (2044004041212), we get a palindrome (4165408045614).

The spelling of 2121404004402 in words is "two trillion, one hundred twenty-one billion, four hundred four million, four thousand, four hundred two".