221501232150000 has 480 divisors, whose sum is σ = 782186561356032. Its totient is φ = 53563200000000.

The previous prime is 221501232149993. The next prime is 221501232150001. The reversal of 221501232150000 is 51232105122.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221501232150001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 661482615 + ... + 661817385.

Almost surely, 2^{221501232150000} is an apocalyptic number.

221501232150000 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 221501232150000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391093280678016).

221501232150000 is an abundant number, since it is smaller than the sum of its proper divisors (560685329206032).

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

221501232150000 is a wasteful number, since it uses less digits than its factorization.

221501232150000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335219 (or 335193 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 221501232150000 its reverse (51232105122), we get a palindrome (221552464255122).

The spelling of 221501232150000 in words is "two hundred twenty-one trillion, five hundred one billion, two hundred thirty-two million, one hundred fifty thousand".