401120221 has 4 divisors (see below), whose sum is σ = 401391100. Its totient is φ = 400849344.

The previous prime is 401120197. The next prime is 401120227. The reversal of 401120221 is 122021104.

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 147355321 + 253764900 = 12139^2 + 15930^2 .

It is a cyclic number.

It is not a de Polignac number, because 401120221 - 2⁵ = 401120189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401120227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133206 + ... + 136183.

It is an arithmetic number, because the mean of its divisors is an integer number (100347775).

Almost surely, 2^401120221 is an apocalyptic number.

It is an amenable number.

401120221 is a deficient number, since it is larger than the sum of its proper divisors (270879).

401120221 is a wasteful number, since it uses less digits than its factorization.

401120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270878.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 401120221 is about 20027.9859446725. The cubic root of 401120221 is about 737.4934802067.

Adding to 401120221 its reverse (122021104), we get a palindrome (523141325).

The spelling of 401120221 in words is "four hundred one million, one hundred twenty thousand, two hundred twenty-one".