20240204102221 has 4 divisors (see below), whose sum is σ = 20241596823292. Its totient is φ = 20238811381152.

The previous prime is 20240204102171. The next prime is 20240204102227. The reversal of 20240204102221 is 12220140204202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6184348317225 + 14055855784996 = 2486835^2 + 3749114^2 .

It is a cyclic number.

It is not a de Polignac number, because 20240204102221 - 2¹⁹ = 20240203577933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20240204102192 and 20240204102201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20240204102227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696338736 + ... + 696367801.

It is an arithmetic number, because the mean of its divisors is an integer number (5060399205823).

Almost surely, 2^{20240204102221} is an apocalyptic number.

It is an amenable number.

20240204102221 is a deficient number, since it is larger than the sum of its proper divisors (1392721071).

20240204102221 is a wasteful number, since it uses less digits than its factorization.

20240204102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392721070.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 20240204102221 its reverse (12220140204202), we get a palindrome (32460344306423).

The spelling of 20240204102221 in words is "twenty trillion, two hundred forty billion, two hundred four million, one hundred two thousand, two hundred twenty-one".