404121211003220 has 24 divisors (see below), whose sum is σ = 848733466142184. Its totient is φ = 161633451442176.

The previous prime is 404121211003141. The next prime is 404121211003253. The reversal of 404121211003220 is 22300112121404.

It can be written as a sum of positive squares in 4 ways, for example, as 225618304195216 + 178502906808004 = 15020596^2 + 13360498^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 939339509 + ... + 939769628.

It is an arithmetic number, because the mean of its divisors is an integer number (35363894422591).

Almost surely, 2^{404121211003220} is an apocalyptic number.

It is an amenable number.

404121211003220 is an abundant number, since it is smaller than the sum of its proper divisors (444612255138964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404121211003220 is a wasteful number, since it uses less digits than its factorization.

404121211003220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879119899 (or 1879119897 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 404121211003220 its reverse (22300112121404), we get a palindrome (426421323124624).

The spelling of 404121211003220 in words is "four hundred four trillion, one hundred twenty-one billion, two hundred eleven million, three thousand, two hundred twenty".