20404404212201 has 4 divisors (see below), whose sum is σ = 20541346522500. Its totient is φ = 20267461901904.

The previous prime is 20404404212189. The next prime is 20404404212209. The reversal of 20404404212201 is 10221240440402.

It is a happy number.

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 1138019568400 + 19266384643801 = 1066780^2 + 4389349^2 .

It is a cyclic number.

It is not a de Polignac number, because 20404404212201 - 2¹⁴ = 20404404195817 is a prime.

It is a super-2 number, since 2×20404404212201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20404404212209) 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, 68471154926 + ... + 68471155223.

It is an arithmetic number, because the mean of its divisors is an integer number (5135336630625).

Almost surely, 2^{20404404212201} is an apocalyptic number.

It is an amenable number.

20404404212201 is a deficient number, since it is larger than the sum of its proper divisors (136942310299).

20404404212201 is a wasteful number, since it uses less digits than its factorization.

20404404212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136942310298.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 20404404212201 its reverse (10221240440402), we get a palindrome (30625644652603).

The spelling of 20404404212201 in words is "twenty trillion, four hundred four billion, four hundred four million, two hundred twelve thousand, two hundred one".