221253350000 has 120 divisors (see below), whose sum is σ = 536386762800. Its totient is φ = 88406720000.

The previous prime is 221253349991. The next prime is 221253350023. The reversal of 221253350000 is 53352122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64148276 + ... + 64151724.

It is an arithmetic number, because the mean of its divisors is an integer number (4469889690).

Almost surely, 2^221253350000 is an apocalyptic number.

221253350000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221253350000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268193381400).

221253350000 is an abundant number, since it is smaller than the sum of its proper divisors (315133412800).

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

221253350000 is an equidigital number, since it uses as much as digits as its factorization.

221253350000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4765 (or 4739 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The spelling of 221253350000 in words is "two hundred twenty-one billion, two hundred fifty-three million, three hundred fifty thousand".