490111201222001 has 4 divisors (see below), whose sum is σ = 490197900537972. Its totient is φ = 490024501906032.

The previous prime is 490111201221979. The next prime is 490111201222133. The reversal of 490111201222001 is 100222102111094.

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 438790382760976 + 51320818461025 = 20947324^2 + 7163855^2 .

It is a cyclic number.

It is not a de Polignac number, because 490111201222001 - 2¹⁸ = 490111200959857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (490111201222901) 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, 43349649506 + ... + 43349660811.

It is an arithmetic number, because the mean of its divisors is an integer number (122549475134493).

Almost surely, 2^{490111201222001} is an apocalyptic number.

It is an amenable number.

490111201222001 is a deficient number, since it is larger than the sum of its proper divisors (86699315971).

490111201222001 is an equidigital number, since it uses as much as digits as its factorization.

490111201222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86699315970.

The product of its (nonzero) digits is 576, while the sum is 26.

Adding to 490111201222001 its reverse (100222102111094), we get a palindrome (590333303333095).

The spelling of 490111201222001 in words is "four hundred ninety trillion, one hundred eleven billion, two hundred one million, two hundred twenty-two thousand, one".