4021210121205 has 16 divisors (see below), whose sum is σ = 6459569411904. Its totient is φ = 2136100992000.

The previous prime is 4021210121171. The next prime is 4021210121207. The reversal of 4021210121205 is 5021210121204.

It is not a de Polignac number, because 4021210121205 - 2²⁴ = 4021193343989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021210121207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 534021484 + ... + 534029013.

It is an arithmetic number, because the mean of its divisors is an integer number (403723088244).

Almost surely, 2^{4021210121205} is an apocalyptic number.

It is an amenable number.

4021210121205 is a deficient number, since it is larger than the sum of its proper divisors (2438359290699).

4021210121205 is a wasteful number, since it uses less digits than its factorization.

4021210121205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068050756.

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 4021210121205 its reverse (5021210121204), we get a palindrome (9042420242409).

Subtracting 4021210121205 from its reverse (5021210121204), we obtain a palindrome (999999999999).

The spelling of 4021210121205 in words is "four trillion, twenty-one billion, two hundred ten million, one hundred twenty-one thousand, two hundred five".