401122221 has 8 divisors (see below), whose sum is σ = 535244064. Its totient is φ = 267207600.

The previous prime is 401122213. The next prime is 401122223. The reversal of 401122221 is 122221104.

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

It is not a de Polignac number, because 401122221 - 2³ = 401122213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 401122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401122223) 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, 47230 + ... + 55071.

It is an arithmetic number, because the mean of its divisors is an integer number (66905508).

Almost surely, 2^401122221 is an apocalyptic number.

It is an amenable number.

401122221 is a deficient number, since it is larger than the sum of its proper divisors (134121843).

401122221 is a wasteful number, since it uses less digits than its factorization.

401122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103611.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 401122221 is about 20028.0358747432. The cubic root of 401122221 is about 737.4947059277.

Adding to 401122221 its reverse (122221104), we get a palindrome (523343325).

The spelling of 401122221 in words is "four hundred one million, one hundred twenty-two thousand, two hundred twenty-one".