401111311221 has 96 divisors (see below), whose sum is σ = 647818000128. Its totient is φ = 237856819200.

The previous prime is 401111311207. The next prime is 401111311231. The reversal of 401111311221 is 122113111104.

401111311221 is a `hidden beast` number, since 401 + 1 + 11 + 31 + 1 + 221 = 666.

It is not a de Polignac number, because 401111311221 - 2¹¹ = 401111309173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 401111311194 and 401111311203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401111311231) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 240617830 + ... + 240619496.

It is an arithmetic number, because the mean of its divisors is an integer number (6748104168).

Almost surely, 2^401111311221 is an apocalyptic number.

It is an amenable number.

401111311221 is a deficient number, since it is larger than the sum of its proper divisors (246706688907).

401111311221 is a wasteful number, since it uses less digits than its factorization.

401111311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491 (or 2488 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 401111311221 its reverse (122113111104), we get a palindrome (523224422325).

The spelling of 401111311221 in words is "four hundred one billion, one hundred eleven million, three hundred eleven thousand, two hundred twenty-one".