20050401121 has 8 divisors (see below), whose sum is σ = 20595917160. Its totient is φ = 19505075328.

The previous prime is 20050401097. The next prime is 20050401127. The reversal of 20050401121 is 12110405002.

It can be written as a sum of positive squares in 4 ways, for example, as 6707610000 + 13342791121 = 81900^2 + 115511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20050401121 - 2⁹ = 20050400609 is a prime.

It is a super-2 number, since 2×20050401121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20050401095 and 20050401104.

It is not an unprimeable number, because it can be changed into a prime (20050401127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180795 + ... + 269791.

It is an arithmetic number, because the mean of its divisors is an integer number (2574489645).

Almost surely, 2^20050401121 is an apocalyptic number.

It is an amenable number.

20050401121 is a deficient number, since it is larger than the sum of its proper divisors (545516039).

20050401121 is an equidigital number, since it uses as much as digits as its factorization.

20050401121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95123.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 20050401121 its reverse (12110405002), we get a palindrome (32160806123).

The spelling of 20050401121 in words is "twenty billion, fifty million, four hundred one thousand, one hundred twenty-one".