221223130401 has 32 divisors (see below), whose sum is σ = 363075650560. Its totient is φ = 116675360064.

The previous prime is 221223130399. The next prime is 221223130417. The reversal of 221223130401 is 104031322122.

It is not a de Polignac number, because 221223130401 - 2¹ = 221223130399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (221223132401) 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 31 ways as a sum of consecutive naturals, for example, 2523930 + ... + 2610108.

It is an arithmetic number, because the mean of its divisors is an integer number (11346114080).

Almost surely, 2^221223130401 is an apocalyptic number.

221223130401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221223130401 is a deficient number, since it is larger than the sum of its proper divisors (141852520159).

221223130401 is a wasteful number, since it uses less digits than its factorization.

221223130401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95605.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221223130401 its reverse (104031322122), we get a palindrome (325254452523).

The spelling of 221223130401 in words is "two hundred twenty-one billion, two hundred twenty-three million, one hundred thirty thousand, four hundred one".