221352124440000 has 140 divisors (see below), whose sum is σ = 731841772624424. Its totient is φ = 59027233152000.

The previous prime is 221352124439969. The next prime is 221352124440037. The reversal of 221352124440000 is 44421253122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 221352124440000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 922180519 + ... + 922420518.

Almost surely, 2^{221352124440000} is an apocalyptic number.

221352124440000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221352124440000 is an abundant number, since it is smaller than the sum of its proper divisors (510489648184424).

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

221352124440000 is an equidigital number, since it uses as much as digits as its factorization.

221352124440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844601072 (or 1844601047 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 221352124440000 its reverse (44421253122), we get a palindrome (221396545693122).

The spelling of 221352124440000 in words is "two hundred twenty-one trillion, three hundred fifty-two billion, one hundred twenty-four million, four hundred forty thousand".