21003421104204 has 48 divisors (see below), whose sum is σ = 61100861396736. Its totient is φ = 5455434052800.

The previous prime is 21003421104181. The next prime is 21003421104221. The reversal of 21003421104204 is 40240112430012.

It is a super-2 number, since 2×21003421104204² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11365486687 + ... + 11365488534.

It is an arithmetic number, because the mean of its divisors is an integer number (1272934612432).

Almost surely, 2^{21003421104204} is an apocalyptic number.

It is an amenable number.

21003421104204 is an abundant number, since it is smaller than the sum of its proper divisors (40097440292532).

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

21003421104204 is a wasteful number, since it uses less digits than its factorization.

21003421104204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22730975246 (or 22730975244 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21003421104204 its reverse (40240112430012), we get a palindrome (61243533534216).

The spelling of 21003421104204 in words is "twenty-one trillion, three billion, four hundred twenty-one million, one hundred four thousand, two hundred four".