221231133030420 has 144 divisors (see below), whose sum is σ = 672894488448000. Its totient is φ = 58834577926656.

The previous prime is 221231133030377. The next prime is 221231133030431. The reversal of 221231133030420 is 24030331132122.

221231133030420 is a `hidden beast` number, since 2 + 2 + 1 + 2 + 3 + 1 + 1 + 330 + 304 + 20 = 666.

It is a super-2 number, since 2×221231133030420² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 105374901 + ... + 107453859.

It is an arithmetic number, because the mean of its divisors is an integer number (4672878392000).

Almost surely, 2^{221231133030420} is an apocalyptic number.

221231133030420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221231133030420 is an abundant number, since it is smaller than the sum of its proper divisors (451663355417580).

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

221231133030420 is a wasteful number, since it uses less digits than its factorization.

221231133030420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080582 (or 2080577 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 221231133030420 its reverse (24030331132122), we get a palindrome (245261464162542).

The spelling of 221231133030420 in words is "two hundred twenty-one trillion, two hundred thirty-one billion, one hundred thirty-three million, thirty thousand, four hundred twenty".