401042103221 has 4 divisors (see below), whose sum is σ = 401047356972. Its totient is φ = 401036849472.

The previous prime is 401042103199. The next prime is 401042103277. The reversal of 401042103221 is 122301240104.

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 155507979025 + 245534124196 = 394345^2 + 495514^2 .

It is a cyclic number.

It is not a de Polignac number, because 401042103221 - 2²² = 401037908917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401042103193 and 401042103202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401042193221) 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, 2510660 + ... + 2665613.

It is an arithmetic number, because the mean of its divisors is an integer number (100261839243).

Almost surely, 2^401042103221 is an apocalyptic number.

It is an amenable number.

401042103221 is a deficient number, since it is larger than the sum of its proper divisors (5253751).

401042103221 is an equidigital number, since it uses as much as digits as its factorization.

401042103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5253750.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 401042103221 its reverse (122301240104), we get a palindrome (523343343325).

The spelling of 401042103221 in words is "four hundred one billion, forty-two million, one hundred three thousand, two hundred twenty-one".